Unit 5 Working the Land 语法课件（共23张）主语从句 课件高中英语人教版选择性必修第一册
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| 名称 | Unit 5 Working the Land 语法课件（共23张）主语从句 课件高中英语人教版选择性必修第一册 |  | |
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| 文件大小 | 335.3KB | ||
| 资源类型 | 教案 | ||
| 版本资源 | 人教版（2019） | ||
| 科目 | 英语 | ||
| 更新时间 | 2025-11-02 19:44:04 | ||
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(共23张PPT)
Unit 5 Working the Land
Grammar: 主语从句
一、概念
在主从复合句中，充当主语的从句叫主语从句，它是名词性从句之一。名词性从句分为：主语从句，宾语从句，表语从句和同位语从句。
二、连接词
引导主语从句的连接词有：
① 从属连词：在从句中不作成分 (that; whether/if)
② 连接代词：在从句中作主语、宾语、表语或定语
(who,whom, whose, what, which, whoever, whatever, whichever等)
③ 连接副词：在从句中作状语 (when, where, why, how)
(1) 从属连词：that, whether/ if
① that在从句中不充当句子成分，也无意义，只起连接作用，但不可省略。
That smoking is harmful to health is known to everyone.
吸烟有害健康，这是大家都知道的。
That you don’t like him is none of my business.
你不喜欢他不关我的事。
That the college will take in more new students this year is true.
今年这所大学将招收更多新生是真的。
(1) 从属连词：that, whether/ if
② whether/if在从句中不充当句子成分，只起连接作用，意为“是否”。whether引导的主语从句既可放在句首，也可放在句末。而if引导的主语从句不能放在句首，只能放在句末。
Whether life exists on other planets is not clear yet.
It is still doubtful whether/ if she will react quickly to our suggestion.
(2) 连接代词：
连接代词包括 who, whom, whose, what, which, whoever,whatever, whichever等
连接代词引导主语从句时，在句中既起连接作用，又在从句中充当主语、宾语、表语或定语。
Who will demonstrate new educational software hasn’t been decided yet.
Whoever solves the puzzle can receive the award.
(3) 连接副词：when, where, why, how
when, where, why, how在从句中作状语，分别表示时间、地点、原因和方式。
When we will set off hasn’t been decided.
我们将何时出发还没有决定。
Why he used that gesture puzzled me for a long time.
他为什么使用那个手势困扰了我很长时间。
三、用it作形式主语，主语从句后置的句型
当主语从句太长，为了避免头重脚轻，常用it作形式主语，而把主语从句后置。
用it作形式主语的常见句型有：
(1) It+ be+形容词+ that从句。
该句型常见形容词有clear, obvious, true, natural,possible, likely, certain, fortunate, strange, necessary,important等。
【例句】It is clear that charges vary according to size.
三、 用it作形式主语，主语从句后置的句型
(2) It+ be+名词（词组）+ that从句。
该句型常见的名词（词组）有a pity, a shame, good news,a fact, an honour,a wonder, no wonder等。
It is a pity that your parents didn’t permit you to go with us.
It is no wonder that you’ve achieved such great success.
三、 用it作形式主语，主语从句后置的句型
(3) It+ be+过去分词+ that从句。
该句型常见的过去分词有said, believed, reported,thought, expected, decided, announced, suggested, hoped等。
It is reported that a violent earthquake happened in Wenchuan, China.
It is believed that boys were better at science than girls.
【误区警示】
当过去分词是suggested, ordered, required, advised, requested,insisted等表示建议、要求、命令等的词时，主语从句应使用虚拟语气，即谓语动词用“(should+)动词原形”。
It is suggested that the work (should) be done with great care.
有人建议，这项工作应该特别谨慎地去做。
It is suggested that you （should） spend more time learning English. 建议你花更多的时间学习英语。
三、 用it作形式主语，主语从句后置的句型
(4) It+不及物动词（短语）+ that从句。
该句型常见的不及物动词（短语）有seem（看上去），turn out（证明是）, happen（碰巧）, appear（显得）等。
It turned out that we were wrong. 结果是我们错了。
It happened that he was out that day. 碰巧他那天不在家。
三、 用it作形式主语，主语从句后置的句型
(5)其他句型
It doesn’t matter whether he likes it or not.
It makes no difference whether you approve of my plan or not.
It suddenly occurred to me that I had left my purse at home.
四、使用主语从句的注意事项
(1)主语从句应用陈述语序
Whether he will help us tackle the problem is doubtful.
四、使用主语从句的注意事项
(2)主谓一致问题
①单个从句作主语时，谓语动词一般用单数。但what引导的从句作主语，且what在主语从句中作宾语时，谓语动词的数应与主句作表语的名词一致。
When we shall have our sports meeting has not been decided.
What the children in the area starve for are books.
四、使用主语从句的注意事项
(2)主谓一致问题
②用and连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或两个以上连接词引导一个主语从句时，谓语动词用单数。
When they will set off and where they will go have not been decided yet.
When and where the meeting will be held has not been decided yet.
四、使用主语从句的注意事项
(3) whether引导的主语从句,如果用了形式主语it,引导词whether可以换成if。如果whether引导的从句在句首或后面直接跟or not，则不能换成if
It has not been decided yet whether/ if he will cut down his novel. = Whether he will cut down his novel has not been decided yet. [不用if]
I don’t know whether or not my son can earn his living. [不用if]
【拓展】
whether与if引导名词性从句
用 法 whether
if
引导不位于句首的主语从句
引导位于句首的主语从句
引导表语从句、同位语从句
引导介词后的宾语从句
直接与or not连用
Ⅰ.单句语法填空
1. ___ the factory will employ more new workers is true.
2. ___ wants to stay in this hotel doesn’t bother about breakfast.
3. It’s a pity ___ the educator didn’t attend the lecture yesterday.
4. It is fortunate ___ I have attained a position in a large company.
5. It is said ___ the win has boosted the team’s confidence.
Answer: 1. That 2.Whoever 3. that 4. that 5. that
6. ___ will clarify how these conclusions are reached is not clear.
7. ___ of you attains your goal will get the prize.
8. ___ was assessed here must be kept a secret.
9. ___ the boy distracts frequently in class is what his teacher wants to know.
10. Every year,___ makes the most beautiful kite will win a prize in the Kite Festival.
Answer:
6. Who 7.Whichever 8. What/Whatever 9. Why 10. Whoever
11. ___ the delayed flight will take off depends much on the weather.
12.___worked on a veterinarian seemed likely to work on his patients.
13. ___ is so breathtaking about the experience is the out of this world scenes.
14. It is not a problem ___ we can win the battle.
15. It’s been reported ___76 percent of employees in some western countries are using emojis at work.
Answer: 11. When 12.What 13. What 14. whether 15. that
Ⅱ.单句写作
1.___（据报道）a new scientific discovery has been made.
2____（她生了一个健康的婴儿）made the family very happy.
3.___（是一个事实）English is widely used in the world.
4.___（她是否会来）is still unknown.
5. It remains a mystery ___（为什么恐龙突然灭绝了）。
6. It is suggested that she ___（唱一首英文歌）for all the guests.
Answer: 1. It is reported that 2.That she gave birth to a healthy baby 3. It is a fact that 4. Whether she will come 5. why dinosaurs suddenly die out 6.(should) sing an English song.
Ⅲ.语法填空
It is a well-known fact 1.____ the faces some people show to the world might be completely different from their real personalities. 2.____ instance, most comedians have permanent smiles on their faces and always sound 3._______ (cheer) because that’s the nature of their work. From this, it’s impossible to know 4.____ their true feelings are. Although they might be laughing outside, they might be crying inside. 5.____ others are feeling is not something that we should make assumptions about, because it’s not always obvious who is truly happy. 6.______is certain is that comedians often use comedy to help them understand 7._________ (them) and the world. In fact, comedy is 8.___ very serious business indeed!
that
For
cheerful
what
How
What
themselves
a
Unit 5 Working the Land
Grammar: 主语从句
一、概念
在主从复合句中，充当主语的从句叫主语从句，它是名词性从句之一。名词性从句分为：主语从句，宾语从句，表语从句和同位语从句。
二、连接词
引导主语从句的连接词有：
① 从属连词：在从句中不作成分 (that; whether/if)
② 连接代词：在从句中作主语、宾语、表语或定语
(who,whom, whose, what, which, whoever, whatever, whichever等)
③ 连接副词：在从句中作状语 (when, where, why, how)
(1) 从属连词：that, whether/ if
① that在从句中不充当句子成分，也无意义，只起连接作用，但不可省略。
That smoking is harmful to health is known to everyone.
吸烟有害健康，这是大家都知道的。
That you don’t like him is none of my business.
你不喜欢他不关我的事。
That the college will take in more new students this year is true.
今年这所大学将招收更多新生是真的。
(1) 从属连词：that, whether/ if
② whether/if在从句中不充当句子成分，只起连接作用，意为“是否”。whether引导的主语从句既可放在句首，也可放在句末。而if引导的主语从句不能放在句首，只能放在句末。
Whether life exists on other planets is not clear yet.
It is still doubtful whether/ if she will react quickly to our suggestion.
(2) 连接代词：
连接代词包括 who, whom, whose, what, which, whoever,whatever, whichever等
连接代词引导主语从句时，在句中既起连接作用，又在从句中充当主语、宾语、表语或定语。
Who will demonstrate new educational software hasn’t been decided yet.
Whoever solves the puzzle can receive the award.
(3) 连接副词：when, where, why, how
when, where, why, how在从句中作状语，分别表示时间、地点、原因和方式。
When we will set off hasn’t been decided.
我们将何时出发还没有决定。
Why he used that gesture puzzled me for a long time.
他为什么使用那个手势困扰了我很长时间。
三、用it作形式主语，主语从句后置的句型
当主语从句太长，为了避免头重脚轻，常用it作形式主语，而把主语从句后置。
用it作形式主语的常见句型有：
(1) It+ be+形容词+ that从句。
该句型常见形容词有clear, obvious, true, natural,possible, likely, certain, fortunate, strange, necessary,important等。
【例句】It is clear that charges vary according to size.
三、 用it作形式主语，主语从句后置的句型
(2) It+ be+名词（词组）+ that从句。
该句型常见的名词（词组）有a pity, a shame, good news,a fact, an honour,a wonder, no wonder等。
It is a pity that your parents didn’t permit you to go with us.
It is no wonder that you’ve achieved such great success.
三、 用it作形式主语，主语从句后置的句型
(3) It+ be+过去分词+ that从句。
该句型常见的过去分词有said, believed, reported,thought, expected, decided, announced, suggested, hoped等。
It is reported that a violent earthquake happened in Wenchuan, China.
It is believed that boys were better at science than girls.
【误区警示】
当过去分词是suggested, ordered, required, advised, requested,insisted等表示建议、要求、命令等的词时，主语从句应使用虚拟语气，即谓语动词用“(should+)动词原形”。
It is suggested that the work (should) be done with great care.
有人建议，这项工作应该特别谨慎地去做。
It is suggested that you （should） spend more time learning English. 建议你花更多的时间学习英语。
三、 用it作形式主语，主语从句后置的句型
(4) It+不及物动词（短语）+ that从句。
该句型常见的不及物动词（短语）有seem（看上去），turn out（证明是）, happen（碰巧）, appear（显得）等。
It turned out that we were wrong. 结果是我们错了。
It happened that he was out that day. 碰巧他那天不在家。
三、 用it作形式主语，主语从句后置的句型
(5)其他句型
It doesn’t matter whether he likes it or not.
It makes no difference whether you approve of my plan or not.
It suddenly occurred to me that I had left my purse at home.
四、使用主语从句的注意事项
(1)主语从句应用陈述语序
Whether he will help us tackle the problem is doubtful.
四、使用主语从句的注意事项
(2)主谓一致问题
①单个从句作主语时，谓语动词一般用单数。但what引导的从句作主语，且what在主语从句中作宾语时，谓语动词的数应与主句作表语的名词一致。
When we shall have our sports meeting has not been decided.
What the children in the area starve for are books.
四、使用主语从句的注意事项
(2)主谓一致问题
②用and连接两个或两个以上的主语从句作主语时，谓语动词用复数；由两个或两个以上连接词引导一个主语从句时，谓语动词用单数。
When they will set off and where they will go have not been decided yet.
When and where the meeting will be held has not been decided yet.
四、使用主语从句的注意事项
(3) whether引导的主语从句,如果用了形式主语it,引导词whether可以换成if。如果whether引导的从句在句首或后面直接跟or not，则不能换成if
It has not been decided yet whether/ if he will cut down his novel. = Whether he will cut down his novel has not been decided yet. [不用if]
I don’t know whether or not my son can earn his living. [不用if]
【拓展】
whether与if引导名词性从句
用 法 whether
if
引导不位于句首的主语从句
引导位于句首的主语从句
引导表语从句、同位语从句
引导介词后的宾语从句
直接与or not连用
Ⅰ.单句语法填空
1. ___ the factory will employ more new workers is true.
2. ___ wants to stay in this hotel doesn’t bother about breakfast.
3. It’s a pity ___ the educator didn’t attend the lecture yesterday.
4. It is fortunate ___ I have attained a position in a large company.
5. It is said ___ the win has boosted the team’s confidence.
Answer: 1. That 2.Whoever 3. that 4. that 5. that
6. ___ will clarify how these conclusions are reached is not clear.
7. ___ of you attains your goal will get the prize.
8. ___ was assessed here must be kept a secret.
9. ___ the boy distracts frequently in class is what his teacher wants to know.
10. Every year,___ makes the most beautiful kite will win a prize in the Kite Festival.
Answer:
6. Who 7.Whichever 8. What/Whatever 9. Why 10. Whoever
11. ___ the delayed flight will take off depends much on the weather.
12.___worked on a veterinarian seemed likely to work on his patients.
13. ___ is so breathtaking about the experience is the out of this world scenes.
14. It is not a problem ___ we can win the battle.
15. It’s been reported ___76 percent of employees in some western countries are using emojis at work.
Answer: 11. When 12.What 13. What 14. whether 15. that
Ⅱ.单句写作
1.___（据报道）a new scientific discovery has been made.
2____（她生了一个健康的婴儿）made the family very happy.
3.___（是一个事实）English is widely used in the world.
4.___（她是否会来）is still unknown.
5. It remains a mystery ___（为什么恐龙突然灭绝了）。
6. It is suggested that she ___（唱一首英文歌）for all the guests.
Answer: 1. It is reported that 2.That she gave birth to a healthy baby 3. It is a fact that 4. Whether she will come 5. why dinosaurs suddenly die out 6.(should) sing an English song.
Ⅲ.语法填空
It is a well-known fact 1.____ the faces some people show to the world might be completely different from their real personalities. 2.____ instance, most comedians have permanent smiles on their faces and always sound 3._______ (cheer) because that’s the nature of their work. From this, it’s impossible to know 4.____ their true feelings are. Although they might be laughing outside, they might be crying inside. 5.____ others are feeling is not something that we should make assumptions about, because it’s not always obvious who is truly happy. 6.______is certain is that comedians often use comedy to help them understand 7._________ (them) and the world. In fact, comedy is 8.___ very serious business indeed!
that
For
cheerful
what
How
What
themselves
a