Grammar 1(条件状语从句)

4. provided/ providing conj.假如, 除非, 以……为条件 He will sign the contract provided we offer
provided (that) + 从句, 表示一种假设条件。 more favorable terms.
如果我们提出更优惠的条件, 他就会在合
9. The volleyball match will be put off if B it ________. A. will rain C. rained B. rains D. is raining
10. — Shall Brown come and play computer games? — No, ________ he has finished his C homework. A. when A. If B. if C. unless D. once C. Since D. Unless
同上签字。
He won’t be against us in the meeting provided that we ask for his advice in advance. 如果我们提前征求一下他的意见, 他 就不会在会上反对我们。
in case 万一，如若
as/so long as 只要
let sb down 让某人失望
引导条件状语从句的其他连词:
1. unless conj. 除非, 如果不
You will fail to arrive there in time unless
you start earlier. Unless it rains, the game will be played.
引导条件状语从句的连词有哪些？？
连词 if 由if引导的条件状语从句表示在某种 条件下某事很可能发生。如: If you ask him, and ＼ he will help you. if 就是连词，引导条件状语从句， 连接这两个句子，不能再加连词（and)
If you fail in the exam, you will let him down. 如果你考试不及格, 你会让他失望的。
3) We shake hands when we make a deal. 4) When we greet someone, we put
the right hand over the left and
bow slightly.
If I see her I’ll invite her to the party. (see, invite) 1. If you ____ take a cake, your host ______ will be very pleased. (take, be) gets better, I 2. Unless the weather ____ _______ will stay at home. (get, stay) 3. He _______ will go home early if he __________ doesn’t feel well. (go, not feel)
In case it rains, do not wait for me.
如若下雨, 就不要等我了。
As long as you make efforts , you will achieve your dream. 只要你努力，你就会实现梦想。
从上述例句可以看出if, unless, on condition (that), supposing, provided等
词引导的条件状语从句, 主从句条件关
系分明, 结构清晰。
在条件状语从句中, 用一般现ind more examples of sentences with if or when in the passage. The keys:
1) If our right hand is busy greeting someone, it cannot be holding a weapon. 2) If you shake hands with someone, you show you trust them.
除非下雨, 比赛将照常进行。
如果你不早点动身, 你就不能及时赶到那儿。
2. on condition (that)... 在……条件下, 如果， 以 …为条件 on condition (that)...引导的条件从句是 主句事件发生的前提条件或唯一条件。 I can tell you the truth on condition that you promise to keep a secret. 我可以告诉你真相, 条件是你答应保 守秘密。
7. —Are you thinking about going to New York for the holiday? B —No. But if I ________the time, I would definitely go. A. have B. had C. have had D. would have B 8. If you _______ this experiment, you will understand the theory better. A. will be doing B. have done C. will have done D. would do
Now tick the true statements.
The sentences from the passage…
1. describe common situations 2. describe impossible situations 3. use if or when to introduce the situation 4. explain the result of the situation in the other part of the sentence 5. use the present simple tense in both parts of the sentence
Book 4 Module 3
Grammar 1(p26)
条件状语从句
Look at these sentences from the passage. If you say the word “communication”, most people think of words and sentences. We use “learned” body language when we are introduced to strangers.
4. What ____ shall I __ do if they ____ talk about
politics? (do, talk)
raise your hand, the taxi 5. If you _____
_________. will stop (raise, stop)
6. I __________ will not say anything unless he ____ asks me. (not say, ask)
件
Supposing it rains, shall we continue the sports meeting? 倘若下雨, 我们的运动会还要继续举行 吗? Supposing something should go wrong, what would you do then?
假如出了什么问题, 你准备怎么对付?
You can go swimming on condition (that)
you don’t go too far from the river bank.
你只有在不远离河岸的条件下才可以下水
游泳。
3. supposing /suppose conj. 假如，倘若
supposing引导的条件从句表示一种假设条
11. ____ D you try, you will never succeed.
B. Until
12. — The air is full of smoke and people are coughing. B — It will get worse ________the government does something about the pollution. A. but B. unless C. except D. if 13. I wonder if I ______ D time. If I ____ time, I’ll go with you. A. have; have B. will have; will have C. have; will have D. will have; have