中小学教育资源及组卷应用平台
【语法知识】
if引导的条件状语从句
条件状语从句通常由连词if引导，意为“如果；假如；倘若”，表示在某种条件下，很可能会发生某种事情或不发生某种事情。
1．if条件状语从句的位置
在 if 引导的条件状语从句中，if 条件句位置比较灵活，可放在主句前面也可放在主句后面。若放在主句前，从句后面要用逗号和主句隔开。如：
If he doesn't feel tired，he will visit the museum.＝He will visit the museum if he doesn't feel tired.如果他不感觉累，他就去参观博物馆。
2．if条件状语从句的时态搭配
(1)当主句用一般将来时，if 引导的条件状语从句要用一般现在时。如：
If it rains tomorrow，I won't climb the hills.如果明天下雨，我就不爬山。
(2)当主句中含有can，may，must等情态动词时，if 引导的条件状语从句要用一般现在时。如：
We can win the basketball game if he joins us.如果他加入我们，我们就能赢这场篮球赛。
(3)当主句是祈使句时，if 引导的条件状语从句要用一般现在时。如：
Help your mom with the housework if you finish your homework early.如果你完成作业早，就帮你妈妈做家务。
3．与其他句式之间的转换
(1)借助“祈使句 ＋ and/or ＋ 一般将来时的句子”这一句型来转换。and在句意上表示顺承关系，or表示转折关系。如：
If you get up early，you'll get there on time.＝ Get up early，and you'll get there on time.
＝Get up early，or you won't get there on time.早点起床，你就会准时`到那里。
(2)借助介词without或with来转换条件状语从句。如：
If there is no water，fish will die.＝Fish will die without water.如果没有水，鱼就会死。
If you help me，I'll finish the work soon.＝With your help，I'll finish the work soon.如果你帮助我，我就会快点完成工作。
(3)if … not引导的条件状语从句，可以借助连词unless来改写。如：
You will be late if you don't go there by bus.＝You will be late unless you go there by bus.如果你不乘公共汽车你就会迟到。
【巩固练习】
用if或 unless 填空：
1. he wants to see me,you can tell him to wait.
2. it snows tomorrow, we'll have a day or two days off.
3.We won't go to his party he invites us.
4.She is sure to pass the examination she is ill.
【拓展】if引导宾语从句
if在宾语从句中的意思为“是否”，时态根据语境来确定。
Eg．我不知道明天是否会下雨。I don’t know
I think 引导的宾语从句
I think 引导的宾语从句应注意：
（1）如后面从句是否定，常将否定前置。如果后面从句是特殊疑问句，特殊疑问词要放句首。
Eg.我认为你不对。I think you are right.
你认为谁会来我们的晚会？ do you think will come to our party
think 表示看法，口语中常用：
我认为是这样。I 我认为不是这样。I think not.=
【语法专项练习】
一、用所给词的适当形式填空。
1.You should go to see a dentist if you________(have) a toothache.
2.If he________(walk) to school, it____________(take) him too much time.
3.If you____________(not go) to bed earlier, you will feel tired in the morning.
4．If it rains tomorrow，I (stay) at home.
5．He will take a trip to Beijing if he ________(be not) busy next week.
6．Please tell Li Jun about it if he ________(come) back.
7．If you don't wear your school uniform to the party，the teachers ________(not let) you in.
8．She ________(not go) shopping with her parents if it snows this afternoon.
9．If you don't give him a gift，he will be ______(upset)．
10．If he __________(not go)hiking tomorrow，I won't，either.
11．I can give you a piece of ________(advice) on your problems.
12．We can see many ________(taxi) in our town.
13．He returned to his desk without knowing what ________(do)．
二、按要求完成句子
1．I think people here will know you.(改为否定句)
I ______think people here______know you.
2．Finish your homework and you can watch the soap opera.(改为含条件状语从句的复合句)
______you finish your homework，you______watch the soap opera.
3．Study hard，or you won't pass the exam. (改为同义句)
If you study hard，you ________ ________ the exam.
4．If you don't help me，I can't work out the problem.(改为同义句)
I can not work out the problem ______ your ______.
5．Anyone can't leave the classroom during the party.(改为祈使句)
______ ______the classroom during the party.
6．I think I will visit the old people's home tomorrow. (对画线部分提问)
________do you think you________ ________tomorrow
7．She will travel around the world. S he will have enough money next year.(用if合并为一句)
She will travel around the world ________ she ________ enough money next year.
8．Hurry up，or you'll be late for the meeting.(改为同义句)
______ ______ hurry up，you will be late for the meeting.
9．Could you tell me how I can get to the new apartment？(改为同义句)
Could you tell me ________ ________ ________ to the new apartment
10．Get up early，or you'll be late for the meeting.(改为同义句)
________ you________ ________ late，you'll be late for the meeting.
三、根据汉语完成句子
1．假如你没有钱了，你会怎么做？
What ________ ________ do if you ________ ________ any money
2．除非我们组织这场晚会，不然李老师会生气的。
________ we organize the party，Mr.Li ________ ________ angry.
3．如果你去动物园，你将会看到可爱的大熊猫。
If you ________ ________ the zoo，you ________ ________ the lovely pandas.
4．如果明天下雨，他们将推迟会议。
If it ________ tomorrow，they ________ ________ ________ ________ ________.
5．你认为下个暑假我们应该去哪儿度假呢？
Where ________ ________ ________ we should go for next summer vacation
6．如果你不努力练球，就永远不可能成为著名的球员。
If you don't practice soccer harder，you'll never ________ ________ ________ soccer player.
四、用if将两个句子合并成一个句子。
1．You like reading.I can lend the book to you.
________________________________________________________________________
2．I am free.I help my mom with the housework.
________________________________________________________________________
3．She comes late.Her teacher isn't happy.
________________________________________________________________________
4．They play computer games at home.It snows.
________________________________________________________________________
5．She doesn't come to visit me.I go to the park.
________________________________________________________________________
五、单项选择
1．If he's available，he ______ around the world.
A．travel B．will travel C．travels D．are going to travel
2．You’d better travel around Nanjing with a local tour guide _______ you want to know more about its culture.
A. unless B. until C. although D. if
3．—How is the weather tomorrow
—I don't know if it______tomorrow. If it______，I'll stay at home.
A．will rain；rains B．rains；will rain C．will rain；will rain D．rains；rains
4． Can you give me _______ on learning English
A. some advice B. some advices C. a lot advice D. a lot of advices
5．She says that she’ll have to close the shop _______ business improves.
A. if B. or C. unless D. because
6. He enjoys _______ at the party.
A. herself B. himself C. yourself D. themselves
7. Our teacher often advises us _______ the habit of making notes while reading.
A. to develop B. develop C. to developing D. developing
【语法知识】
if引导的条件状语从句
条件状语从句通常由连词if引导，意为“如果；假如；倘若”，表示在某种条件下，很可能会发生某种事情或不发生某种事情。
1．if条件状语从句的位置
在 if 引导的条件状语从句中，if 条件句位置比较灵活，可放在主句前面也可放在主句后面。若放在主句前，从句后面要用逗号和主句隔开。如：
If he doesn't feel tired，he will visit the museum.＝He will visit the museum if he doesn't feel tired.如果他不感觉累，他就去参观博物馆。
2．if条件状语从句的时态搭配
(1)当主句用一般将来时，if 引导的条件状语从句要用一般现在时。如：
If it rains tomorrow，I won't climb the hills.如果明天下雨，我就不爬山。
(2)当主句中含有can，may，must等情态动词时，if 引导的条件状语从句要用一般现在时。如：
We can win the basketball game if he joins us.如果他加入我们，我们就能赢这场篮球赛。
(3)当主句是祈使句时，if 引导的条件状语从句要用一般现在时。如：
Help your mom with the housework if you finish your homework early.如果你完成作业早，就帮你妈妈做家务。
3．与其他句式之间的转换
(1)借助“祈使句 ＋ and/or ＋ 一般将来时的句子”这一句型来转换。and在句意上表示顺承关系，or表示转折关系。如：
If you get up early，you'll get there on time.＝ Get up early，and you'll get there on time.
＝Get up early，or you won't get there on time.早点起床，你就会准时`到那里。
(2)借助介词without或with来转换条件状语从句。如：
If there is no water，fish will die.＝Fish will die without water.如果没有水，鱼就会死。
If you help me，I'll finish the work soon.＝With your help，I'll finish the work soon.如果你帮助我，我就会快点完成工作。
(3)if … not引导的条件状语从句，可以借助连词unless来改写。如：
You will be late if you don't go there by bus.＝You will be late unless you go there by bus.如果你不乘公共汽车你就会迟到。
【巩固练习】
用if或 unless 填空：
1. he wants to see me,you can tell him to wait.
2. it snows tomorrow, we'll have a day or two days off.
3.We won't go to his party he invites us.
4.She is sure to pass the examination she is ill.
【拓展】if引导宾语从句
if在宾语从句中的意思为“是否”，时态根据语境来确定。
Eg．我不知道明天是否会下雨。I don’t know
I think 引导的宾语从句
I think 引导的宾语从句应注意：
（2）如后面从句是否定，常将否定前置。如果后面从句是特殊疑问句，特殊疑问词要放句首。
Eg.我认为你不对。I think you are right.
你认为谁会来我们的晚会？ do you think will come to our party
think 表示看法，口语中常用：
我认为是这样。I 我认为不是这样。I think not.=
【语法专项练习】
一、用所给词的适当形式填空。
1.You should go to see a dentist if you________(have) a toothache.
2.If he________(walk) to school, it____________(take) him too much time.
3.If you____________(not go) to bed earlier, you will feel tired in the morning.
4．If it rains tomorrow，I (stay) at home.
5．He will take a trip to Beijing if he ________(be not) busy next week.
6．Please tell Li Jun about it if he ________(come) back.
7．If you don't wear your school uniform to the party，the teachers ________(not let) you in.
8．She ________(not go) shopping with her parents if it snows this afternoon.
9．If you don't give him a gift，he will be ______(upset)．
10．If he __________(not go)hiking tomorrow，I won't，either.
11．I can give you a piece of ________(advice) on your problems.
12．We can see many ________(taxi) in our town.
13．He returned to his desk without knowing what ________(do)．
二、按要求完成句子
1．I think people here will know you.(改为否定句)
I ______think people here______know you.
2．Finish your homework and you can watch the soap opera.(改为含条件状语从句的复合句)
______you finish your homework，you______watch the soap opera.
3．Study hard，or you won't pass the exam. (改为同义句)
If you study hard，you ________ ________ the exam.
4．If you don't help me，I can't work out the problem.(改为同义句)
I can not work out the problem ______ your ______.
5．Anyone can't leave the classroom during the party.(改为祈使句)
______ ______the classroom during the party.
6．I think I will visit the old people's home tomorrow. (对画线部分提问)
________do you think you________ ________tomorrow
7．She will travel around the world. S he will have enough money next year.(用if合并为一句)
She will travel around the world ________ she ________ enough money next year.
8．Hurry up，or you'll be late for the meeting.(改为同义句)
______ ______ hurry up，you will be late for the meeting.
9．Could you tell me how I can get to the new apartment？(改为同义句)
Could you tell me ________ ________ ________ to the new apartment
10．Get up early，or you'll be late for the meeting.(改为同义句)
________ you________ ________ late，you'll be late for the meeting.
三、根据汉语完成句子
1．假如你没有钱了，你会怎么做？
What ________ ________ do if you ________ ________ any money
2．除非我们组织这场晚会，不然李老师会生气的。
________ we organize the party，Mr.Li ________ ________ angry.
3．如果你去动物园，你将会看到可爱的大熊猫。
If you ________ ________ the zoo，you ________ ________ the lovely pandas.
4．如果明天下雨，他们将推迟会议。
If it ________ tomorrow，they ________ ________ ________ ________ ________.
5．你认为下个暑假我们应该去哪儿度假呢？
Where ________ ________ ________ we should go for next summer vacation
6．如果你不努力练球，就永远不可能成为著名的球员。
If you don't practice soccer harder，you'll never ________ ________ ________ soccer player.
四、用if将两个句子合并成一个句子。
1．You like reading.I can lend the book to you.
________________________________________________________________________
2．I am free.I help my mom with the housework.
________________________________________________________________________
3．She comes late.Her teacher isn't happy.
________________________________________________________________________
4．They play computer games at home.It snows.
________________________________________________________________________
5．She doesn't come to visit me.I go to the park.
________________________________________________________________________
五、单项选择
1．If he's available，he ______ around the world.
A．travel B．will travel C．travels D．are going to travel
2．You’d better travel around Nanjing with a local tour guide _______ you want to know more about its culture.
A. unless B. until C. although D. if
3．—How is the weather tomorrow
—I don't know if it______tomorrow. If it______，I'll stay at home.
A．will rain；rains B．rains；will rain C．will rain；will rain D．rains；rains
4． Can you give me _______ on learning English
A. some advice B. some advices C. a lot advice D. a lot of advices
5．She says that she’ll have to close the shop _______ business improves.
A. if B. or C. unless D. because
6. He enjoys _______ at the party.
A. herself B. himself C. yourself D. themselves
7. Our teacher often advises us _______ the habit of making notes while reading.
A. to develop B. develop C. to developing D. developing
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" 21世纪教育网(www.21cnjy.com)中小学教育资源及组卷应用平台
【语法知识】
if引导的条件状语从句
条件状语从句通常由连词if引导，意为“如果；假如；倘若”，表示在某种条件下，很可能会发生某种事情或不发生某种事情。
1．if条件状语从句的位置
在 if 引导的条件状语从句中，if 条件句位置比较灵活，可放在主句前面也可放在主句后面。若放在主句前，从句后面要用逗号和主句隔开。如：
If he doesn't feel tired，he will visit the museum.＝He will visit the museum if he doesn't feel tired.如果他不感觉累，他就去参观博物馆。
2．if条件状语从句的时态搭配
(1)当主句用一般将来时，if 引导的条件状语从句要用一般现在时。如：
If it rains tomorrow，I won't climb the hills.如果明天下雨，我就不爬山。
(2)当主句中含有can，may，must等情态动词时，if 引导的条件状语从句要用一般现在时。如：
We can win the basketball game if he joins us.如果他加入我们，我们就能赢这场篮球赛。
(3)当主句是祈使句时，if 引导的条件状语从句要用一般现在时。如：
Help your mom with the housework if you finish your homework early.如果你完成作业早，就帮你妈妈做家务。
3．与其他句式之间的转换
(1)借助“祈使句 ＋ and/or ＋ 一般将来时的句子”这一句型来转换。and在句意上表示顺承关系，or表示转折关系。如：
If you get up early，you'll get there on time.＝ Get up early，and you'll get there on time.
＝Get up early，or you won't get there on time.早点起床，你就会准时`到那里。
(2)借助介词without或with来转换条件状语从句。如：
If there is no water，fish will die.＝Fish will die without water.如果没有水，鱼就会死。
If you help me，I'll finish the work soon.＝With your help，I'll finish the work soon.如果你帮助我，我就会快点完成工作。
(3)if … not引导的条件状语从句，可以借助连词unless来改写。如：
You will be late if you don't go there by bus.＝You will be late unless you go there by bus.如果你不乘公共汽车你就会迟到。
【巩固练习】
用if或 unless 填空：
1. If he wants to see me,you can tell him to wait.
2. If it snows tomorrow, we'll have a day or two days off.
3.We won't go to his party unless he invites us.
4.She is sure to pass the examination unless she is ill.
【拓展】if引导宾语从句
if在宾语从句中的意思为“是否”，时态根据语境来确定。
Eg．我不知道明天是否会下雨。I don’t know if it will rain tomorrow.
I think 引导的宾语从句
I think 引导的宾语从句应注意：
（1）如后面从句是否定，常将否定前置。如果后面从句是特殊疑问句，特殊疑问词要放句首。
Eg.我认为你不对。I don’t think you are right.
你认为谁会来我们的晚会？ Who do you think will come to our party
think 表示看法，口语中常用：
我认为是这样。I think so 我认为不是这样。I think not.= I don’t think so
【语法专项练习】
一、用所给词的适当形式填空。
1.You should go to see a dentist if you___have_____(have) a toothache.
2.If he___walks_____(walk) to school, it____will take________(take) him too much time.
3.If you____don't go_______(not go) to bed earlier, you will feel tired in the morning.
4．If it rains tomorrow，I ____will stay____(stay) at home.
5．He will take a trip to Beijing if he ___isn't_____(be not) busy next week.
6．Please tell Li Jun about it if he ____comes____(come) back.
7．If you don't wear your school uniform to the party，the teachers __won't let____(not let) you in.
8．She ____doesn't go___(not go) shopping with her parents if it snows this afternoon.
9．If you don't give him a gift，he will be ___upset___(upset)．
10．If he ___doesn't go_______(not go)hiking tomorrow，I won't，either.
11．I can give you a piece of ___advice_____(advice) on your problems.
12．We can see many __taxis______(taxi) in our town.
13．He returned to his desk without knowing what __to do______(do)．
二、按要求完成句子
1．I think people here will know you.(改为否定句)
I ___don't___think people here__will____know you.
2．Finish your homework and you can watch the soap opera.(改为含条件状语从句的复合句)
____If__you finish your homework，you__can___watch the soap opera.
3．Study hard，or you won't pass the exam. (改为同义句)
If you study hard，you __will ______ __pass______ the exam.
4．If you don't help me，I can't work out the problem.(改为同义句)
I can not work out the problem __without____ your __help____.
5．Anyone can't leave the classroom during the party.(改为祈使句)
___Don't ___ ____leave__the classroom during the party.
6．I think I will visit the old people's home tomorrow. (对画线部分提问)
____.What____do you think you____ will____ ____do____tomorrow
7．She will travel around the world. S he will have enough money next year.(用if合并为一句)
She will travel around the world ___if_____ she ____has____ enough money next year.
8．Hurry up，or you'll be late for the meeting.(改为同义句)
___If ___ ___you___ don't hurry up，you will be late for the meeting.
9．Could you tell me how I can get to the new apartment？(改为同义句)
Could you tell me __how______ ____ to____ ___get _____ to the new apartment
10．Get up early，or you'll be late for the meeting.(改为同义句)
_____If___ you___get_____ ____up____ late，you'll be late for the meeting.
三、根据汉语完成句子
1．假如你没有钱了，你会怎么做？
What ___will_____ ___you_____ do if you ____don't____ ___have_____ any money
2．除非我们组织这场晚会，不然李老师会生气的。
____Unless____ we organize the party，Mr.Li __will______ ____be____ angry.
3．如果你去动物园，你将会看到可爱的大熊猫。
If you ___go_____ ___to_____ the zoo，you ____will____ __ see______ the lovely pandas.
4．如果明天下雨，他们将推迟会议。
If it ___rains__ tomorrow，they __will __ __put __ __off__ __the___ ___meeting__.
5．你认为下个暑假我们应该去哪儿度假呢？
Where ___do_____ ____you____ ____think____ we should go for next summer vacation
6．如果你不努力练球，就永远不可能成为著名的球员。
If you don't practice soccer harder，you'll never __become__ _a___ __famous___ soccer player.
四、用if将两个句子合并成一个句子。
1．You like reading.I can lend the book to you.
______1.If you like reading，I can lend the book to you. ___________
2．I am free.I help my mom with the housework.
______If I am free，I will help my mom with the housework.__________
3．She comes late.Her teacher isn't happy.
________Her teacher won't be happy if she comes late.____________
4．They play computer games at home.It snows.
__________They will play computer games at home if it snows._______
5．She doesn't come to visit me.I go to the park.
_______If she doesn't come to visit me，I will go to the park.
五、单项选择
1．If he's available，he ______ around the world.
A．travel B．will travel C．travels D．are going to travel
2．You’d better travel around Nanjing with a local tour guide _______ you want to know more about its culture.
A. unless B. until C. although D. if
3．—How is the weather tomorrow
—I don't know if it______tomorrow. If it______，I'll stay at home.
A．will rain；rains B．rains；will rain C．will rain；will rain D．rains；rains
4． Can you give me _______ on learning English
A. some advice B. some advices C. a lot advice D. a lot of advices
5．She says that she’ll have to close the shop _______ business improves.
A. if B. or C. unless D. because
6. He enjoys _______ at the party.
A. herself B. himself C. yourself D. themselves
7. Our teacher often advises us _______ the habit of making notes while reading.
A. to develop B. develop C. to developing D. developing
1-5.BDAA C 6-7. B A
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