if打印试题

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If 引导的条件状语从句
学习" if " 引导的条件状语从句的用法,现在总结一下: if 条件句不一般,几个要点记心间;
条件句,放在前,逗号要放句中间。

条件句表可能,主句多用将来时;
条件句表事实,主句常用现在时。

@在 if 引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。

如:
We can walk there if we can't find a bus .
If it rains tomorrow ,we will not go to the zoo. What will you do if you find a panda in danger.
@如果 if 条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。

如: If bears are in danger ,they attack people.
if从句用一般现在时,主句用一般现在时
If you heat ice it turns to water. (也可用will turn)如果把冰加热,它就会化成水。

在 if 引导的条件状语从句中,if 和条件句位置灵活,可直接放在主句后面,若 if 条件句放句首,从句后
面要加逗号,和主句隔开。

还要注意前后时态一致原则
if 条件状语从句的时态练习
一.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 (will agree/ agree/agrees) soon.
3. If there (will be/ are/is) a car 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 (will land/land/lands) in front of me, I (will go/go/goes) in to 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. Mr Smith (will let/ let/lets) you know if he (will need/ need/ needs) help.
11. (Will / Do/ Does) he visit the museum if he (won’t / don’t/ doesn’t) get tired?
12. Where (will/ do/does) they live if they (will miss/ miss/ misses) the bus?
二、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) fewer trees, there
_______________( be) more pollution.
4. He _____________(dress) more casually if he
________________( not work) on weekends.
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) if
they_______________(argue).
8. I ____________(have) a bake sale if I
_____________(need) money for education.
9. Peter _____________( send) me a beautiful souvenir if he ________________(tour) Spain. 10. If Mr Green ___________(say) I am hard- working, my parents _________( feel) glad.
11.I ____________(go) to the beach if
it________________ ( not rain) this week.
12. __________they __________( have) a match 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.
II. if引导的条件状语从句
1.含义:条件状语从句是在复合句中作条件状语的句子。

表示假如有从句的动作发生就会有主句的动作发生,条件状语从句常由从属连词if引导。

You will catch the bus if you get up early.
如果你早起的话,就能赶上公共汽车。

2. 类别
主祈从现:主句是祈使句,从句是由if引导的使用一般现在时的句子。

If you want to go, please tell me. 如果你想去,请告诉我。

Print the photo if you like it.
如果你喜欢这照片就把它打印出来。

主将从现:指if引导的条件状语从句用一般现在时,主句用一般将来时。

If it doesn’t rain tomorrow, we’ll go to the Great Wall.如果明天不下雨,我们就会去长城。

If you don’t get up early, you will be late for school.如果你不早点起床,你上学就会迟到。

主现从现:if从句用一般现在时,主句用一般现在时If you heat ice it turns to water. (也可用will turn)如果把冰加热,它就会化成水。

3. if引导的条件状语从句用法:
(1)位置
if引导的条件状语从句,既可放在主句之前也可放在主句之后。

当从句置于主句之前时,常用逗号与主句隔开。

You will catch the bus if you get up early.
=If you get up early, you will catch the bus.
如果你早起的话,就能赶上公共汽车。

(2)时态:应遵循主、从句时态呼应的原则。

当主句是一般现在时(包含祈使句和含情态动词can, may, must等的句子),从句也用一般现在时。

You must see the doctor if you are ill.
如果你生病了,你必须去看医生。

If you want to go skating, wear warm clothes.
如果你想去溜冰,穿上暖和的衣服。

如果主句是一般将来时,从句必须用一般现在时。

You will be late for school if you get up late.
如果你起晚了,你上学将迟到。

If it rains tomorrow, we won’t go to the Great Wall.如果明天下雨,我们就不去长城了。

(3)在if引导的条件状语从句中,当主句是一般将来时时,不能使用be going to结构,而要用will。

I’ll help you with your English if I am free tomorrow.如果明天我有空,我会帮助你学英语。

(4)在if引导的条件状语从句中不能使用some,而要用any。

If you have any questions to ask, please come to my office.如果你有问题要问的话,请到我办公室来。

(5)同义句转换
if引导的条件状语从句可转换成简单句,其方法如下:
* 借助“祈使句+and/ or+简单句”结构。

其中and表示句意顺承,or表示句意转折。

If you work hard, you’ll pass the exam.
=Work hard, and you’ll pass the exam.
如果你努力学习,你就会通过考试。

If you don’t hurry up, you’ll be late.
= Hurry up, or you’ll be late.
如果你不快点,你将会迟到。

**借助介词with 或without来转换。

【例句】
If you help me, I’ll finish my job soon. =With your help, I’ll finish my job soon.如果你帮我,我将很快完成我的工作。

If there is no water, fish may die.
= Fish may die without water.。

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