If引导的条件状语从句

一、定义：我们用if句子谈论可能发生的动作或可能出现的情况。

二、用法：

1.当if从句用一般现在时，表将来，主句用一般将来时。

如If you ask him, he will help you.

2.if从句既可位于主句前，也可位于主句后。如果位于主句前，需在if从句后加逗号“，”。

如If it doesn't rain, we'll climb themountain tomorrow.

=We'll climb the mountain tomorrow,if it doesn't rain.

3.含有if从句的复合句中，主句中的will可以用情态动词来代替。

If there is no water, we can'tlive.

4.含有if从句的复合句中，主句也可以用祈使句。

如：Please stay at home if it blowsheavily tomorrow.

5.同义句转换

用祈使句+“，”+and/or +一般将来时

If you work hard, you'll pass theexam easily.

=Work hard, and you'll pass the exameasily.

If you don't hurry up, you'llmiss the train.

=Hurry up ,or you'll miss thetrain.

含有介词with和without的介词短语

If there is no water, fish can'tlive.

=Fish can't live without water.

Unless=If …not 如果不，主将从现

If you don't go , I won't go.

=Unless you go ,I won't go.

if条件状语从句的时态练习

I.单项选择

1.If you _____ to the party, you'llhave a great time.

a. will go b. went c. go d. going

2.I____ her the answer ifshe____me.

a. can tell, will ask b.will tell, will ask

c. would tell, ask d.will tell, asks

3.–what are you going to dotomorrow?

--we'll go to the librarytomorrow if it ___.

a. isn't rain b. rain c. won't rain d. doesn't rain

4. what will you do if you _____to Peter's home?

a. go b. went c. going d. will go

5.I'll give the book to him ifhe___ here next Sunday.

a. will come b. comes c.is coming d. came

6.If you don't like this dress,you _____ give it to Gina.

a. can b./ c. did d. do

7.If you are free,______ the bookto Peter.

a. take b .will take c. took d.takes

II、用所给词的适当形式填空

1. If you _______(feel) tired,you ­­______(have) to have a rest.

2. Where _____ he______(see) the film if he________(have) time?

3. If there ____ (be) fewertrees, there _______ (be)more pollution.

4. He _____ (dress)more casually if he _______(notwork) on weekdays.

5.If Marcia _______ (live) alone,she _______ (keep)a pet parrot.

6. Lana _____ (buy) a new dress if the old one ____(be) out of style.

7. The twins _____ (fight) ifthey__________ (argue).

8. I______ (have) a sale if I____(need) money for education.

9. Peter ____ (send) me a beautiful souvenir if he____(tour) spain.

10.If mr. green _______ (say) Iam hard- working, my parents _____ (feel) glad.

11. I______ (go) to the beach ifit________ (not rain)this week.

12. ____they ______ (have) amatch if the P.E.teacher _______ (be) busy?

13. He _______ (write) a letter to his grandparents if he ______ (get) his report card this week.

14. If she ______ (get) up late,she _____ (not catch) the early bus.

15. Peter _________ (major) inEnglish if he_______(pass) the exams in PekingUniversity.

III. 完成句子(每空不限一词)

1. 他如果看电视太久了，他的父母会不高兴。

If he ___________ TV too much,his parents_________unhappy.

2. 如果明天不下雨，我会和你一起去公园的。

If it _____________tomorrow,I______ go to the park_____you.

3. 如果他有空，他会帮助你的。

If he _______________, he_________ you.

Ⅳ．在正确的答案下划一条线。

1.Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .

2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (willagree/ agree/agrees) soon.

3. If there (will be/ are/is) acar accident, they (will call/call/calls) 110 for help at once.

4. If it (won't/don't/doesn't/isn't) rainy, we (will take/ take/takes) walk outside.

5. If a UFO (willland/land/lands) in front of me, I(will go/go/goes) into look for the alien.

6. If he (will have/have/has)money, he (will bulid/build/builds) a science lab.

7.Don't wait for me if I (am/will be) late.

8.They (won't/don't) go to the beach if it (will rain/rain /rains).

9. I (will call/ call) you if he(will stay/stay/stays) at home.

10. (Will / Do/ Does) he visit the museum if he (won't / don't/ doesn't)get tired?

11. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?

Ⅴ句型转换

If you don't study hard, you will not find a good job.(改为同义句)

①______________,_________you will find a good job.

②______________,__________ you won't find a good job.

2. Without trees, animals will die.(改为同义句)

______ there are ______ trees,animals will die.

3.Unless(如果不) it rains, we will go on apicnic.(改为同义句)

______ it ______ ________, we will go on a picnic.

4.I play computer games.My mum is angry.(改成if 从句)

______I _______computer games, my mum ______ ______angry.

Ⅵ改错

If you walk along the road, you see many new buildings._________

If he will come tomorrow, I will call you._______

We don't go swimming if it is arainy day._______

We will have a picnic if it won'train.__________

答案：

I. 1.c 2.d 3.d 4.a 5.b 6.a 7.a

II 1.feel; will have2.will;see; has 3.are; will be4.will dress;doesn't work 5.lives;will keep 6.will buy;is 7.will fight;argue8.willhave;need 9.will send;tours 10.says;will feel 11.will go;doesn't rain12.will;have;is 13.will write;gets 14.gets;won't catch 15.will major;passes

III.1.watches;will be 2.doesn'train;will;with 3.is free/has time;will help

Ⅳ.1.will go;passed 2.willteach;agrees 3.is;will call 4.isn't ;will take 5.lands;will go 6.has;will build7.am8.won't;rains 9.will call; stays 10.Will;doesn't 11.will;miss

Ⅴ1.(1)Study;hard;and (2)Study;hard;or 2.If; no3If ;doesn't ;rain4.If; play;will;be

Ⅵ1.see改为willsee 2. will come 改为comes 3.don't改为won't 4.won't 改为doesn't

If引导的条件状语从句

一、定义：我们用if句子谈论可能发生的动作或可能出现的情况。

二、用法：

1.当if从句用一般现在时，表将来，主句用一般将来时。

如If you ask him, he will help you.

2.if从句既可位于主句前，也可位于主句后。如果位于主句前，需在if从句后加逗号“，”。

如If it doesn't rain, we'll climb themountain tomorrow.

=We'll climb the mountain tomorrow,if it doesn't rain.

3.含有if从句的复合句中，主句中的will可以用情态动词来代替。

If there is no water, we can'tlive.

4.含有if从句的复合句中，主句也可以用祈使句。

如：Please stay at home if it blowsheavily tomorrow.

5.同义句转换

用祈使句+“，”+and/or +一般将来时

If you work hard, you'll pass theexam easily.

=Work hard, and you'll pass the exameasily.

If you don't hurry up, you'llmiss the train.

=Hurry up ,or you'll miss thetrain.

含有介词with和without的介词短语

If there is no water, fish can'tlive.

=Fish can't live without water.

Unless=If …not 如果不，主将从现

If you don't go , I won't go.

=Unless you go ,I won't go.

if条件状语从句的时态练习

I.单项选择

1.If you _____ to the party, you'llhave a great time.

a. will go b. went c. go d. going

2.I____ her the answer ifshe____me.

a. can tell, will ask b.will tell, will ask

c. would tell, ask d.will tell, asks

3.–what are you going to dotomorrow?

--we'll go to the librarytomorrow if it ___.

a. isn't rain b. rain c. won't rain d. doesn't rain

4. what will you do if you _____to Peter's home?

a. go b. went c. going d. will go

5.I'll give the book to him ifhe___ here next Sunday.

a. will come b. comes c.is coming d. came

6.If you don't like this dress,you _____ give it to Gina.

a. can b./ c. did d. do

7.If you are free,______ the bookto Peter.

a. take b .will take c. took d.takes

II、用所给词的适当形式填空

1. If you _______(feel) tired,you ­­______(have) to have a rest.

2. Where _____ he______(see) the film if he________(have) time?

3. If there ____ (be) fewertrees, there _______ (be)more pollution.

4. He _____ (dress)more casually if he _______(notwork) on weekdays.

5.If Marcia _______ (live) alone,she _______ (keep)a pet parrot.

6. Lana _____ (buy) a new dress if the old one ____(be) out of style.

7. The twins _____ (fight) ifthey__________ (argue).

8. I______ (have) a sale if I____(need) money for education.

9. Peter ____ (send) me a beautiful souvenir if he____(tour) spain.

10.If mr. green _______ (say) Iam hard- working, my parents _____ (feel) glad.

11. I______ (go) to the beach ifit________ (not rain)this week.

12. ____they ______ (have) amatch if the P.E.teacher _______ (be) busy?

13. He _______ (write) a letter to his grandparents if he ______ (get) his report card this week.

14. If she ______ (get) up late,she _____ (not catch) the early bus.

15. Peter _________ (major) inEnglish if he_______(pass) the exams in PekingUniversity.

III. 完成句子(每空不限一词)

1. 他如果看电视太久了，他的父母会不高兴。

If he ___________ TV too much,his parents_________unhappy.

2. 如果明天不下雨，我会和你一起去公园的。

If it _____________tomorrow,I______ go to the park_____you.

3. 如果他有空，他会帮助你的。

If he _______________, he_________ you.

Ⅳ．在正确的答案下划一条线。

1.Daina ( will go/go/goes) to Europe if she (will pass/pass/passes) the exams .

2. The graduates (will teach/teach/teaches) in the poor village if the Ministry of Education (willagree/ agree/agrees) soon.

3. If there (will be/ are/is) acar accident, they (will call/call/calls) 110 for help at once.

4. If it (won't/don't/doesn't/isn't) rainy, we (will take/ take/takes) walk outside.

5. If a UFO (willland/land/lands) in front of me, I(will go/go/goes) into look for the alien.

6. If he (will have/have/has)money, he (will bulid/build/builds) a science lab.

7.Don't wait for me if I (am/will be) late.

8.They (won't/don't) go to the beach if it (will rain/rain /rains).

9. I (will call/ call) you if he(will stay/stay/stays) at home.

10. (Will / Do/ Does) he visit the museum if he (won't / don't/ doesn't)get tired?

11. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?

Ⅴ句型转换

If you don't study hard, you will not find a good job.(改为同义句)

①______________,_________you will find a good job.

②______________,__________ you won't find a good job.

2. Without trees, animals will die.(改为同义句)

______ there are ______ trees,animals will die.

3.Unless(如果不) it rains, we will go on apicnic.(改为同义句)

______ it ______ ________, we will go on a picnic.

4.I play computer games.My mum is angry.(改成if 从句)

______I _______computer games, my mum ______ ______angry.

Ⅵ改错

If you walk along the road, you see many new buildings._________

If he will come tomorrow, I will call you._______

We don't go swimming if it is arainy day._______

We will have a picnic if it won'train.__________

答案：

I. 1.c 2.d 3.d 4.a 5.b 6.a 7.a

II 1.feel; will have2.will;see; has 3.are; will be4.will dress;doesn't work 5.lives;will keep 6.will buy;is 7.will fight;argue8.willhave;need 9.will send;tours 10.says;will feel 11.will go;doesn't rain12.will;have;is 13.will write;gets 14.gets;won't catch 15.will major;passes

III.1.watches;will be 2.doesn'train;will;with 3.is free/has time;will help

Ⅳ.1.will go;passed 2.willteach;agrees 3.is;will call 4.isn't ;will take 5.lands;will go 6.has;will build7.am8.won't;rains 9.will call; stays 10.Will;doesn't 11.will;miss

Ⅴ1.(1)Study;hard;and (2)Study;hard;or 2.If; no3If ;doesn't ;rain4.If; play;will;be

Ⅵ1.see改为willsee 2. will come 改为comes 3.don't改为won't 4.won't 改为doesn't