2.ought to比should 语气强

(1)should 表示主观看法，一些建议，劝说时，译作“应当”。 ought to，直接接动词原形，更多反映客观情况，“有义务”或“必要”做某事，译为“应当，应该”

(2)ought to的否定就表示做某事一定是错误的而should的否定就表示某动作不一定要做

ought to 是唯一一个可加to的情态动词!

例：我们应该学习帮助其他人。

We __________learn to help others.

We __________ to learn to help others.

我们不应该浪费水、污染水。

We _________ waste or pollute water.

We____________ to waste or pollute water.

1

(　 ) 1 John___ come to see us tonight, but he isn't very sure yet.

A. may　　 B. can　 C. has to　 D. must

(　 ) 2 They ___ do well in the exam.　　

A. can be able to　 B. be able to　 C. can able to　 D. are able to

(　 ) 3 -May I take this book out?　　 --No, you___.

A. can't　　 B. may not　 C. needn't　 D. aren't

(　 ) 4 You___ go and see a doctor at once because you're got a fever.

A. can　　 B. must　 C. dare　 D. would

(　 ) 5 -Can you speak Japanese?　 -No, I____.　　

A. mustn't　 B. can't　 C. needn't　 D. may not

2

(　 ) 1 -He___ be in the classroom, I think.

-No, he ___ be in the classroom. I saw him go home a minute ago.

A. can; may not　 B. must; may not　 C. may; can't　 　D. may; mustn't

(　 ) 2 --Shall I get one more cake for you, Dad?　

--Thanks, but you___, I've had enough.

A. may not　 B. must not　 C. can't　　 D. needn't

(　 ) 3 Even the top students in our class can't work out this problem, so it _____ be very difficult.

A. may　 B. must　 C. can　　 D. need

(　 ) 4 He isn't at school. I think he ___ be ill.　　　　

A. can　　 B. shall　 C. must　 D. has to

(　 ) 5 ___ I take this one?　　　　　　　　　　　

A. May　 B. Will　 C. Are　　 D. Do

3

(　 ) 1 The children___ play football on the road.　　

A. can't　　 B. can　　 C. mustn't　 D. must

(　 ) 2 You ___ be late for school again next time.

A. mustn't　　 B. needn't　　 C. don't have to　 D. don't need to

(　 ) 3 -Must I do my homework at once?　 --No, you___.　

A. needn't　　 B. mustn't　　 C. can't　　 D. may not

should 和 ought to 有什么区别？

1.大体上两者的意思是相同的,通常可以互相转换

20.in one week’s time

19.have experienc

18.make a decision

17.different ideas

16.take notes

15.the head teacher

14.hold a meeting

13.be responsible for sb.