【期中考点培优】专题12 句型转换-2025-2026学年四年级英语上册期中复习考点培优外研版（一起）（含答案解析）
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| 名称 | 【期中考点培优】专题12 句型转换-2025-2026学年四年级英语上册期中复习考点培优外研版（一起）（含答案解析） |  | |
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| 科目 | 英语 | ||
| 更新时间 | 2025-11-03 08:36:41 | ||
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/ 让学习更有效 期中备考培优 | 英语学科
/ 让学习更有效 期中备考培优 | 英语学科
2025-2026学年四年级英语上册期中复习考点培优外研版（一起）
专题12 句型转换
学校:___________姓名：___________班级：___________考号：___________
1．Beijing is cold in winter. (改为否定句)
2．Sam will be ten next year. (改为一般疑问句)
3．Grandma is a teacher now. (用 before改写句子)
4．Sam has got a new T-shirt. (用I改写句子)
5．It is cold in Dalian in winter. (改为一般疑问句并做肯定回答)
6．We are at Buckingham Palace now. (用 yesterday改写句子)
7．He was at the Great Wall. (对画线部分提问)
8．We’ve got long, black hair. (用 she改写句子)
9．I’m writing a letter. (对画线部分提问)
10．She lives in London. (对画线部分提问)
11．Amy plays the flute every day. (用 last week改写句子)
12．My trousers were dirty. (改为一般疑问句)
13．Tom usually plays basketball on Sundays. (用 yesterday改写句子)
14．My father cooked noodles last Sunday. (用 every morning改写句子)
15．My room was very dirty. (用 rooms改写句子)
16．I phone my grandma every day. (用last Sunday改写句子)
17．I clean my room on Sundays. (用 yesterday改写句子)
18．She was very happy. (改为一般疑问句)
19．She was a teacher. (改为否定句)
20．She is washing her trousers now. (用yesterday改写句子)
She her trousers yesterday.
21．The pig cooked fish yesterday. (用 every day改写句子)
22．It’s a boring day. (改为感叹句)
23．Lingling phoned her teacher yesterday. (改为否定句)
24．I help my mum every day. (用 she改写句子)
25．He stayed at home yesterday. (改为否定句)
26．We listened to music yesterday. (改成否定句)
27．He is in Hong Kong now. (用 yesterday改写句子)
28．He played with his friends last Monday. (用 on Mondays改写句子)
29．I usually get up at six. (用 my mother改写句子)
30．I got up at six this morning. (改为否定句)
31．My school is next to the park. (用 beside改写句子)
My school is .
32．The tree is behind the cat. (改为同义句)
The cat is the tree.
33．The shop is beside the hospital. (改为同义句)
The shop is the hospital.
34．I sit before Tom. (改为同义句)
Tom me.
35．I was in front of Amy last week. (改为同义句)
36．My seat is next to the door. (改为同义句)
37．I was in front of Wang Xin last Monday. (改为否定句)
38．Daming walked to school last week. (用 every day改写句子)
Daming to school .
39．Tom doesn’t play football. (用 yesterday改写句子)
Tom football yesterday.
40．They invented many important things. (改为否定句)
41．Did you go skating (做否定回答)
42．I didn’t see many mountains. (改为肯定句)
43．I fell over again and again. (改为否定句)
44．I eat apples every day. (用 yesterday 改写句子)
45．I was able to swim. (改为否定句)
46．We played basketball. We ate many candies. (合并为一句话)
47．Sara saw lots of beautiful plants yesterday. (用 tomorrow改写句子)
48．Daming’s mother cooks fish. (用last week 改写句子)
49．We will go on a trip tomorrow. (用 yesterday改写句子)
50．Lily’s cooking fish for her family now. (用 yesterday 改写句子)
Lily for her family yesterday.
/ 让学习更有效 期中备考培优 | 英语学科
/ 让学习更有效 期中备考培优 | 英语学科
21世纪教育网(www.21cnjy.com)
21世纪教育网(www.21cnjy.com)
参考答案及试题解析
1．Beijing isn’t cold in winter.
【解析】句意：北京在冬天很冷。本题考查句型转换，题干要求改为否定句，is需变成否定形式isn’t，故答案为Beijing isn’t cold in winter.
2．Will Sam be ten next year
【解析】原句句意：萨姆明年就十岁了。本题考查句型转换。句子是陈述句，时态是一般将来时，句子中有will，变为一般疑问句时把will提前。句意为：萨姆明年十岁了吗？故答案为Will Sam be ten next year
3．Grandma was a teacher before.
【解析】原句句意：(外)祖母现在是一名老师。本题考查句型转换。句子是陈述句，用before改写句子，句子变为一般过去时，所以is变为was。故答案为Grandma was a teacher before.
4．I have got a new T-shirt.
【解析】原句句意：山姆有一件新的T恤。本题考查句型转换。根据题干要求和句意，将Sam改成I，has got改成have got，故答案为I have got a new T-shirt.
5．Is it cold in Dalian in winter Yes, it is.
【解析】句意：大连冬天很冷。本题考查句型转换，改为一般疑问句将is提前，问句是Is it cold in Dalian in winter 其肯定回答是Yes, 主语+is. 故答案为Is it cold in Dalian in winter Yes, it is.
6．We were at Buckingham Palace yesterday.
【解析】句意：我们现在在白金汉宫。本题考查句型转换，句子是陈述句，时态是一般现在时，题干要求用yesterday改写句子，句子变为一般过去时，动词are用过去式were，句意为：我们昨天在白金汉宫。故答案为We were at Buckingham Palace yesterday.
7．Where was he
【解析】原句句意：他是在长城。本题考查句型转换。由画线部分可知要提问地点，用where提问，句意是：他是在哪里？句子是一般过去时。他he，是be，在哪where。主语是he，be用was。故答案为Where was he
8．She has got long, black hair.
【解析】句意：我们有长黑发。本题考查句型转换，题干要求用“she”改写句子，可知需要将原句的主语从“we”改为“she”，并将动词“have”变为第三人称单数形式has，故答案为She has got long, black hair.
9．What are you doing
【解析】原句句意：我正在写信。本题考查句型转换。句子是陈述句，时态为现在进行时。画线部分是正在做的事情，用what提问，画线部分用doing代替，主语I变为you，be动词用are，故答案为What are you doing
10．Where does she live
【解析】句意：她住在伦敦。本题考查句型转换，画线部分是地点，用where提问，问句句意为：她住在哪里？问句结构为：Where+助动词+主语+动词原形？ 句子是一般现在时，助动词用does，lives的原形是live，故答案为Where does she live
11．Amy played the flute last week.
【解析】原句句意：艾米每天吹笛子。本题考查句型转换。本题要求用last week改写，即将句子改为一般过去时，play改为played，故答案为Amy played the flute last week.
12．Were your trousers dirty
【解析】原句句意：我的裤子脏了。本题考查句型转换，句子是陈述句，时态是一般过去时。改为一般疑问句需将were提前，将my改为your，故答案为Were your trousers dirty
13．Tom played basketball yesterday.
【解析】原句句意：汤姆通常在周日打篮球。本题考查句型转换。根据句意和题干要求，改写的句子的句意是：汤姆昨天打篮球了。汤姆Tom，打篮球play basketball，昨天yesterday。yesterday是一般过去时的标志，play用过去式played。故答案为Tom played basketball yesterday.
14．My father cooks noodles every morning.
【解析】原句句意：我的爸爸上周日做面条了。本题考查句型转换。句子是陈述句，时态是一般过去时。用every morning改写句子，句子变为一般现在时，主语是第三人称单数，动词需要用第三人称单数，cook的第三人称单数是cooks，句意为：我爸爸每天早上做面条。故答案为My father cooks noodles every morning.
15．My rooms were very dirty.
【解析】原句句意：我的房间很脏。本题考查句型转换。主语room改为复数rooms，be动词was也要改为复数were。故答案为My rooms were very dirty.
16．I phoned my grandma last Sunday.
【解析】原句句意：我每天给我的祖母(外祖母)打电话。本题考查句型转换，题干要求用last Sunday改写句子，句子变为一般过去时，phone用过去式phoned，其他不变，故答案为I phoned my grandma last Sunday.
17．I cleaned my room yesterday.
【解析】原句句意：我周日打扫房间。本题考查句型转换，题干要求用yesterday改写句子，句子变为一般过去时，clean用过去式cleaned，其他不变，故答案为I cleaned my room yesterday.
18．Was she very happy
【解析】句意：她很高兴。本题考查句型转换。句子中含有be动词，把be动词提前到句首，问句为：她很高兴吗？故答案为Was she very happy
19．She wasn’t a teacher.
【解析】原句句意：她是一名教师。本题考查句型转换。该句变成否定句的句意是：她不是一名教师。不是was not=wasn’t，故答案为She wasn’t a teacher.
20．washed
【解析】原句句意：她现在正在洗她的裤子。本题考查句型转换，原句时态为现在进行时，题干要求用yesterday改写句子，时态变为一般过去时，动词wash用过去式washed，故答案为washed。
21．The pig cooks fish every day.
【解析】句意：猪昨天煮了鱼。本题考查句型转换，根据句意可知该句是陈述句，时态为一般过去时，every day是一般现在时的标志词，主语The pig是第三人称单数，谓语动词cooked变为第三人称单数cooks，故答案为The pig cooks fish every day.
22．What a boring day!
【解析】原句句意：今天很无聊。本题考查句型转换。题目要求改为感叹句，What引导的感叹句结构为：What+（a/an）+形容词+名词+（主语+谓语）！How引导的感叹句结构为：How+形容词/副词+（主语+谓语）！故答案为What a boring day!
23．Lingling didn’t phone her teacher yesterday.
【解析】句意：玲玲昨天给她的老师打电话了。本题考查句型转换。句子是含有实义动词的句子，时态是一般过去时，否定句在动词前加助动词didn’t，动词的过去式phoned变成原形phone，故答案为Lingling didn’t phone her teacher yesterday.
24．She helps her mum every day.
【解析】原句句意：我每天都帮助我的妈妈。本题考查句型转换。本题要求用she改写句子，谓语help用第三人称单数helps。故答案为She helps her mum every day.
25．He didn’t stay at home yesterday.
【解析】原句句意：昨天他待在家。本题考查句型转换。题目要求改为否定句。该句已有谓语动词stayed，根据yesterday可知时态为一般过去时，变否定要借助助动词did，后加not变否定，did not可缩写为didn’t，did后动词用原形stay，故答案为He didn’t stay at home yesterday.
26．We didn’t listen to music yesterday.
【解析】原句句意：昨天我们听了音乐。本题考查句型转换。句子是一般过去时，变否定句要借助助动词did，did not可缩写为didn’t，句子中的listened，要变为原形listen。故答案为We didn’t listen to music yesterday.
27．He was in Hong Kong yesterday.
【解析】句意：他现在在香港。本题考查句子转换。句子是陈述句的肯定形式，用 yesterday改写句子即把时态改成一般过去时，be动词is变成过去式was，故答案为He was in Hong Kong yesterday.
28．He plays with his friends on Mondays.
【解析】原句句意：上星期一他和他的朋友们一起玩。本题考查句型转换，根据题干要求，要将句中时间词“last Monday”改为“on Mondays”，on Mondays表示每逢周一，时态由一般过去时改为一般现在时，主语是he，谓语动词用第三人单数plays，故答案为He plays with his friends on Mondays.
29．My mother usually gets up at six.
【解析】句意：我通常6点起床。本题考查句子转换。句子是陈述句的肯定形式，时态是一般现在时态，用 my mother改写句子即把动词get变成动词的第三人称单数gets，故答案为My mother usually gets up at six.
30．I didn’t get up at six this morning.
【解析】原句句意：我今天早上六点起床。本题考查句型转换。句子是陈述句，时态为一般过去时，句子有实义动词got，改为否定句需借助助动词的否定形式did not，可以缩写成didn’t。句意为：我今天早上没有六点起床。故答案为I didn’t get up at six this morning.
31．beside the park
【解析】句意：我的学校在公园附近。本题考查句型转换。next to介词固定搭配，挨着，可以和beside替换，next to the park可以和beside the park替换，故答案为beside；the；park。
32．in front of
【解析】句意：树在猫的后面。本题考查句型转换，题干要求改为同义句，同义句句意：猫在树的前面。The cat is in front of the tree. 故答案为in；front；of。
33．next to
【解析】原句句意：商店在医院旁边。本题考查句型转换。beside在……旁边，其同义短语是next to在……近旁，故答案为next，to。
34．sits behind
【解析】原句句意：我坐在汤姆的前面。本题考查句型转换。同义句为：汤姆坐在我后面。在……后面behind，该句时态是一般现在时，主语Tom是第三人称单数，谓语动词要用第三人称单数sits。故答案为sits，behind。
35．Amy was behind me last week.
【解析】原句句意：我上周在艾米的前面。本题考查句型转换。句子是陈述句，时态是一般过去时。改为同义句可说：艾米上周在我后面。在……后面behind，介词后跟人称代词宾格me，主语是第三人称单数，be用was，故答案为Amy was behind me last week.
36．My seat is beside the door.
【解析】原句句意：我的座位在门边。本题考查句型转换。题目要求改为同义句，挨近next to=beside，故答案为My seat is beside the door.
37．I wasn’t in front of Wang Xin last Monday.
【解析】句意：我上周一在王欣的前面。本题考查句型转换。本题是含有be动词的句子，否定句在be动词was后面加not，was和not缩写为wasn’t，故答案为I wasn’t in front of Wang Xin last Monday.
38．walks every day
【解析】原句句意：上周大明步行去上学。本题考查句型转换。用every day改写句子，句子时态为一般现在时，主语Daming是第三人称单数，谓语动词walked要用第三人称单数walks，故答案为walks，every，day。
39．didn’t play
【解析】原句句意：汤姆不踢足球。本题考查句型转换。用yesterday改写句子，句子时态为一般过去式，助动词用didn’t，后接动词原形play，故答案为didn’t，play。
40．They didn’t invent many important things.
【解析】原句句意：他们发明了许多重要的事物。本题考查句型转换。原句是一般过去时，改为否定句，在动词invented前面加助动词did的否定形式didn’t，动词invented改为原形invent，故答案为They didn’t invent many important things.
41．No, I/ we didn’t.
【解析】句意：你（你们）去滑冰了吗？本题考查句型转换，该句是助动词引导的一般疑问句，其时态是一般过去时，否定回答的句型应为：No，主语+didn’t.，问句主语是you，答语主语用I或we，故答案为No, I/we didn’t.
42．I saw many mountains.
【解析】句意：我没有看到很多山。本题考查句型转换。原句助动词是didn’t，改为肯定句，去掉didn’t，see变为过去式saw，故答案为I saw many mountains.
43．I didn’t fall over again and again.
【解析】句意：我一次又一次跌倒。本题考查句型转换，根据句意可知该句是陈述句，时态为一般过去时，fell是实义动词的过去式，变为否定句借助助动词didn’t，fell恢复原形fall，故答案为I didn’t fall over again and again.
44．I ate apples yesterday.
【解析】原句句意：我每天吃苹果。本题考查句型转换，题干要求用yesterday改写句子，句子变为一般过去时，eat用过去式ate，其他不变，故答案为I ate apples yesterday.
45．I wasn’t able to swim.
【解析】原句句意：我会游泳了。本题考查句型转换。句子是陈述句，时态是一般过去时。改为否定句需在was后加not，可以缩写成wasn’t，故答案为I wasn’t able to swim.
46．We played basketball and ate many candies.
【解析】原句句意：我们打篮球。我们吃了很多糖果。本题考查句型转换。句子是陈述句，时态是一般过去式。合并为一句可说：我们打了篮球并吃了很多糖果。用and连接两个动词短语，故答案为We played basketball and ate many candies.
47．Sara will see lots of beautiful plants tomorrow.
【解析】原句句意：萨拉昨天看见了很多美丽的植物。本题考查句型转换。句子是陈述句，时态是一般过去时。题干要求用tomorrow改写句子，句子变为一般将来时，用will+动词原形，故答案为Sara will see lots of beautiful plants tomorrow.
48．Daming’s mother cooked fish last week.
【解析】句意：大明的妈妈做了鱼。本题考查句型转换。题目要求用last week 改写，即把时态改为一般过去时，谓语动词cooks变为过去式cooked，加上时间last week，故答案为Daming’s mother cooked fish last week。
49．We went on a trip yesterday.
【解析】原句句意：我们明天将要去旅行。本题考查句型转换。句子是陈述句，时态是一般将来时。题干要求用yesterday改写句子，句子变为一般过去式，动词go用过去式went，故答案为We went on a trip yesterday.
50．cooked fish
【解析】原句句意：莉莉现在正在给家人做鱼。本题考查句型转换。用 yesterday改写句子，句子时态变为一般过去时，谓语动词要用过去式，cooking的原形是cook，过去式是cooked，其他部分不变。故答案为cooked fish。
21世纪教育网(www.21cnjy.com)
21世纪教育网(www.21cnjy.com)
/ 让学习更有效 期中备考培优 | 英语学科
2025-2026学年四年级英语上册期中复习考点培优外研版（一起）
专题12 句型转换
学校:___________姓名：___________班级：___________考号：___________
1．Beijing is cold in winter. (改为否定句)
2．Sam will be ten next year. (改为一般疑问句)
3．Grandma is a teacher now. (用 before改写句子)
4．Sam has got a new T-shirt. (用I改写句子)
5．It is cold in Dalian in winter. (改为一般疑问句并做肯定回答)
6．We are at Buckingham Palace now. (用 yesterday改写句子)
7．He was at the Great Wall. (对画线部分提问)
8．We’ve got long, black hair. (用 she改写句子)
9．I’m writing a letter. (对画线部分提问)
10．She lives in London. (对画线部分提问)
11．Amy plays the flute every day. (用 last week改写句子)
12．My trousers were dirty. (改为一般疑问句)
13．Tom usually plays basketball on Sundays. (用 yesterday改写句子)
14．My father cooked noodles last Sunday. (用 every morning改写句子)
15．My room was very dirty. (用 rooms改写句子)
16．I phone my grandma every day. (用last Sunday改写句子)
17．I clean my room on Sundays. (用 yesterday改写句子)
18．She was very happy. (改为一般疑问句)
19．She was a teacher. (改为否定句)
20．She is washing her trousers now. (用yesterday改写句子)
She her trousers yesterday.
21．The pig cooked fish yesterday. (用 every day改写句子)
22．It’s a boring day. (改为感叹句)
23．Lingling phoned her teacher yesterday. (改为否定句)
24．I help my mum every day. (用 she改写句子)
25．He stayed at home yesterday. (改为否定句)
26．We listened to music yesterday. (改成否定句)
27．He is in Hong Kong now. (用 yesterday改写句子)
28．He played with his friends last Monday. (用 on Mondays改写句子)
29．I usually get up at six. (用 my mother改写句子)
30．I got up at six this morning. (改为否定句)
31．My school is next to the park. (用 beside改写句子)
My school is .
32．The tree is behind the cat. (改为同义句)
The cat is the tree.
33．The shop is beside the hospital. (改为同义句)
The shop is the hospital.
34．I sit before Tom. (改为同义句)
Tom me.
35．I was in front of Amy last week. (改为同义句)
36．My seat is next to the door. (改为同义句)
37．I was in front of Wang Xin last Monday. (改为否定句)
38．Daming walked to school last week. (用 every day改写句子)
Daming to school .
39．Tom doesn’t play football. (用 yesterday改写句子)
Tom football yesterday.
40．They invented many important things. (改为否定句)
41．Did you go skating (做否定回答)
42．I didn’t see many mountains. (改为肯定句)
43．I fell over again and again. (改为否定句)
44．I eat apples every day. (用 yesterday 改写句子)
45．I was able to swim. (改为否定句)
46．We played basketball. We ate many candies. (合并为一句话)
47．Sara saw lots of beautiful plants yesterday. (用 tomorrow改写句子)
48．Daming’s mother cooks fish. (用last week 改写句子)
49．We will go on a trip tomorrow. (用 yesterday改写句子)
50．Lily’s cooking fish for her family now. (用 yesterday 改写句子)
Lily for her family yesterday.
/ 让学习更有效 期中备考培优 | 英语学科
/ 让学习更有效 期中备考培优 | 英语学科
21世纪教育网(www.21cnjy.com)
21世纪教育网(www.21cnjy.com)
参考答案及试题解析
1．Beijing isn’t cold in winter.
【解析】句意：北京在冬天很冷。本题考查句型转换，题干要求改为否定句，is需变成否定形式isn’t，故答案为Beijing isn’t cold in winter.
2．Will Sam be ten next year
【解析】原句句意：萨姆明年就十岁了。本题考查句型转换。句子是陈述句，时态是一般将来时，句子中有will，变为一般疑问句时把will提前。句意为：萨姆明年十岁了吗？故答案为Will Sam be ten next year
3．Grandma was a teacher before.
【解析】原句句意：(外)祖母现在是一名老师。本题考查句型转换。句子是陈述句，用before改写句子，句子变为一般过去时，所以is变为was。故答案为Grandma was a teacher before.
4．I have got a new T-shirt.
【解析】原句句意：山姆有一件新的T恤。本题考查句型转换。根据题干要求和句意，将Sam改成I，has got改成have got，故答案为I have got a new T-shirt.
5．Is it cold in Dalian in winter Yes, it is.
【解析】句意：大连冬天很冷。本题考查句型转换，改为一般疑问句将is提前，问句是Is it cold in Dalian in winter 其肯定回答是Yes, 主语+is. 故答案为Is it cold in Dalian in winter Yes, it is.
6．We were at Buckingham Palace yesterday.
【解析】句意：我们现在在白金汉宫。本题考查句型转换，句子是陈述句，时态是一般现在时，题干要求用yesterday改写句子，句子变为一般过去时，动词are用过去式were，句意为：我们昨天在白金汉宫。故答案为We were at Buckingham Palace yesterday.
7．Where was he
【解析】原句句意：他是在长城。本题考查句型转换。由画线部分可知要提问地点，用where提问，句意是：他是在哪里？句子是一般过去时。他he，是be，在哪where。主语是he，be用was。故答案为Where was he
8．She has got long, black hair.
【解析】句意：我们有长黑发。本题考查句型转换，题干要求用“she”改写句子，可知需要将原句的主语从“we”改为“she”，并将动词“have”变为第三人称单数形式has，故答案为She has got long, black hair.
9．What are you doing
【解析】原句句意：我正在写信。本题考查句型转换。句子是陈述句，时态为现在进行时。画线部分是正在做的事情，用what提问，画线部分用doing代替，主语I变为you，be动词用are，故答案为What are you doing
10．Where does she live
【解析】句意：她住在伦敦。本题考查句型转换，画线部分是地点，用where提问，问句句意为：她住在哪里？问句结构为：Where+助动词+主语+动词原形？ 句子是一般现在时，助动词用does，lives的原形是live，故答案为Where does she live
11．Amy played the flute last week.
【解析】原句句意：艾米每天吹笛子。本题考查句型转换。本题要求用last week改写，即将句子改为一般过去时，play改为played，故答案为Amy played the flute last week.
12．Were your trousers dirty
【解析】原句句意：我的裤子脏了。本题考查句型转换，句子是陈述句，时态是一般过去时。改为一般疑问句需将were提前，将my改为your，故答案为Were your trousers dirty
13．Tom played basketball yesterday.
【解析】原句句意：汤姆通常在周日打篮球。本题考查句型转换。根据句意和题干要求，改写的句子的句意是：汤姆昨天打篮球了。汤姆Tom，打篮球play basketball，昨天yesterday。yesterday是一般过去时的标志，play用过去式played。故答案为Tom played basketball yesterday.
14．My father cooks noodles every morning.
【解析】原句句意：我的爸爸上周日做面条了。本题考查句型转换。句子是陈述句，时态是一般过去时。用every morning改写句子，句子变为一般现在时，主语是第三人称单数，动词需要用第三人称单数，cook的第三人称单数是cooks，句意为：我爸爸每天早上做面条。故答案为My father cooks noodles every morning.
15．My rooms were very dirty.
【解析】原句句意：我的房间很脏。本题考查句型转换。主语room改为复数rooms，be动词was也要改为复数were。故答案为My rooms were very dirty.
16．I phoned my grandma last Sunday.
【解析】原句句意：我每天给我的祖母(外祖母)打电话。本题考查句型转换，题干要求用last Sunday改写句子，句子变为一般过去时，phone用过去式phoned，其他不变，故答案为I phoned my grandma last Sunday.
17．I cleaned my room yesterday.
【解析】原句句意：我周日打扫房间。本题考查句型转换，题干要求用yesterday改写句子，句子变为一般过去时，clean用过去式cleaned，其他不变，故答案为I cleaned my room yesterday.
18．Was she very happy
【解析】句意：她很高兴。本题考查句型转换。句子中含有be动词，把be动词提前到句首，问句为：她很高兴吗？故答案为Was she very happy
19．She wasn’t a teacher.
【解析】原句句意：她是一名教师。本题考查句型转换。该句变成否定句的句意是：她不是一名教师。不是was not=wasn’t，故答案为She wasn’t a teacher.
20．washed
【解析】原句句意：她现在正在洗她的裤子。本题考查句型转换，原句时态为现在进行时，题干要求用yesterday改写句子，时态变为一般过去时，动词wash用过去式washed，故答案为washed。
21．The pig cooks fish every day.
【解析】句意：猪昨天煮了鱼。本题考查句型转换，根据句意可知该句是陈述句，时态为一般过去时，every day是一般现在时的标志词，主语The pig是第三人称单数，谓语动词cooked变为第三人称单数cooks，故答案为The pig cooks fish every day.
22．What a boring day!
【解析】原句句意：今天很无聊。本题考查句型转换。题目要求改为感叹句，What引导的感叹句结构为：What+（a/an）+形容词+名词+（主语+谓语）！How引导的感叹句结构为：How+形容词/副词+（主语+谓语）！故答案为What a boring day!
23．Lingling didn’t phone her teacher yesterday.
【解析】句意：玲玲昨天给她的老师打电话了。本题考查句型转换。句子是含有实义动词的句子，时态是一般过去时，否定句在动词前加助动词didn’t，动词的过去式phoned变成原形phone，故答案为Lingling didn’t phone her teacher yesterday.
24．She helps her mum every day.
【解析】原句句意：我每天都帮助我的妈妈。本题考查句型转换。本题要求用she改写句子，谓语help用第三人称单数helps。故答案为She helps her mum every day.
25．He didn’t stay at home yesterday.
【解析】原句句意：昨天他待在家。本题考查句型转换。题目要求改为否定句。该句已有谓语动词stayed，根据yesterday可知时态为一般过去时，变否定要借助助动词did，后加not变否定，did not可缩写为didn’t，did后动词用原形stay，故答案为He didn’t stay at home yesterday.
26．We didn’t listen to music yesterday.
【解析】原句句意：昨天我们听了音乐。本题考查句型转换。句子是一般过去时，变否定句要借助助动词did，did not可缩写为didn’t，句子中的listened，要变为原形listen。故答案为We didn’t listen to music yesterday.
27．He was in Hong Kong yesterday.
【解析】句意：他现在在香港。本题考查句子转换。句子是陈述句的肯定形式，用 yesterday改写句子即把时态改成一般过去时，be动词is变成过去式was，故答案为He was in Hong Kong yesterday.
28．He plays with his friends on Mondays.
【解析】原句句意：上星期一他和他的朋友们一起玩。本题考查句型转换，根据题干要求，要将句中时间词“last Monday”改为“on Mondays”，on Mondays表示每逢周一，时态由一般过去时改为一般现在时，主语是he，谓语动词用第三人单数plays，故答案为He plays with his friends on Mondays.
29．My mother usually gets up at six.
【解析】句意：我通常6点起床。本题考查句子转换。句子是陈述句的肯定形式，时态是一般现在时态，用 my mother改写句子即把动词get变成动词的第三人称单数gets，故答案为My mother usually gets up at six.
30．I didn’t get up at six this morning.
【解析】原句句意：我今天早上六点起床。本题考查句型转换。句子是陈述句，时态为一般过去时，句子有实义动词got，改为否定句需借助助动词的否定形式did not，可以缩写成didn’t。句意为：我今天早上没有六点起床。故答案为I didn’t get up at six this morning.
31．beside the park
【解析】句意：我的学校在公园附近。本题考查句型转换。next to介词固定搭配，挨着，可以和beside替换，next to the park可以和beside the park替换，故答案为beside；the；park。
32．in front of
【解析】句意：树在猫的后面。本题考查句型转换，题干要求改为同义句，同义句句意：猫在树的前面。The cat is in front of the tree. 故答案为in；front；of。
33．next to
【解析】原句句意：商店在医院旁边。本题考查句型转换。beside在……旁边，其同义短语是next to在……近旁，故答案为next，to。
34．sits behind
【解析】原句句意：我坐在汤姆的前面。本题考查句型转换。同义句为：汤姆坐在我后面。在……后面behind，该句时态是一般现在时，主语Tom是第三人称单数，谓语动词要用第三人称单数sits。故答案为sits，behind。
35．Amy was behind me last week.
【解析】原句句意：我上周在艾米的前面。本题考查句型转换。句子是陈述句，时态是一般过去时。改为同义句可说：艾米上周在我后面。在……后面behind，介词后跟人称代词宾格me，主语是第三人称单数，be用was，故答案为Amy was behind me last week.
36．My seat is beside the door.
【解析】原句句意：我的座位在门边。本题考查句型转换。题目要求改为同义句，挨近next to=beside，故答案为My seat is beside the door.
37．I wasn’t in front of Wang Xin last Monday.
【解析】句意：我上周一在王欣的前面。本题考查句型转换。本题是含有be动词的句子，否定句在be动词was后面加not，was和not缩写为wasn’t，故答案为I wasn’t in front of Wang Xin last Monday.
38．walks every day
【解析】原句句意：上周大明步行去上学。本题考查句型转换。用every day改写句子，句子时态为一般现在时，主语Daming是第三人称单数，谓语动词walked要用第三人称单数walks，故答案为walks，every，day。
39．didn’t play
【解析】原句句意：汤姆不踢足球。本题考查句型转换。用yesterday改写句子，句子时态为一般过去式，助动词用didn’t，后接动词原形play，故答案为didn’t，play。
40．They didn’t invent many important things.
【解析】原句句意：他们发明了许多重要的事物。本题考查句型转换。原句是一般过去时，改为否定句，在动词invented前面加助动词did的否定形式didn’t，动词invented改为原形invent，故答案为They didn’t invent many important things.
41．No, I/ we didn’t.
【解析】句意：你（你们）去滑冰了吗？本题考查句型转换，该句是助动词引导的一般疑问句，其时态是一般过去时，否定回答的句型应为：No，主语+didn’t.，问句主语是you，答语主语用I或we，故答案为No, I/we didn’t.
42．I saw many mountains.
【解析】句意：我没有看到很多山。本题考查句型转换。原句助动词是didn’t，改为肯定句，去掉didn’t，see变为过去式saw，故答案为I saw many mountains.
43．I didn’t fall over again and again.
【解析】句意：我一次又一次跌倒。本题考查句型转换，根据句意可知该句是陈述句，时态为一般过去时，fell是实义动词的过去式，变为否定句借助助动词didn’t，fell恢复原形fall，故答案为I didn’t fall over again and again.
44．I ate apples yesterday.
【解析】原句句意：我每天吃苹果。本题考查句型转换，题干要求用yesterday改写句子，句子变为一般过去时，eat用过去式ate，其他不变，故答案为I ate apples yesterday.
45．I wasn’t able to swim.
【解析】原句句意：我会游泳了。本题考查句型转换。句子是陈述句，时态是一般过去时。改为否定句需在was后加not，可以缩写成wasn’t，故答案为I wasn’t able to swim.
46．We played basketball and ate many candies.
【解析】原句句意：我们打篮球。我们吃了很多糖果。本题考查句型转换。句子是陈述句，时态是一般过去式。合并为一句可说：我们打了篮球并吃了很多糖果。用and连接两个动词短语，故答案为We played basketball and ate many candies.
47．Sara will see lots of beautiful plants tomorrow.
【解析】原句句意：萨拉昨天看见了很多美丽的植物。本题考查句型转换。句子是陈述句，时态是一般过去时。题干要求用tomorrow改写句子，句子变为一般将来时，用will+动词原形，故答案为Sara will see lots of beautiful plants tomorrow.
48．Daming’s mother cooked fish last week.
【解析】句意：大明的妈妈做了鱼。本题考查句型转换。题目要求用last week 改写，即把时态改为一般过去时，谓语动词cooks变为过去式cooked，加上时间last week，故答案为Daming’s mother cooked fish last week。
49．We went on a trip yesterday.
【解析】原句句意：我们明天将要去旅行。本题考查句型转换。句子是陈述句，时态是一般将来时。题干要求用yesterday改写句子，句子变为一般过去式，动词go用过去式went，故答案为We went on a trip yesterday.
50．cooked fish
【解析】原句句意：莉莉现在正在给家人做鱼。本题考查句型转换。用 yesterday改写句子，句子时态变为一般过去时，谓语动词要用过去式，cooking的原形是cook，过去式是cooked，其他部分不变。故答案为cooked fish。
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