摘要:I. 情态动词基本用法: 情态动词 用法 否定式 疑问式与简答 can 能力 允许或许可 可能性(表猜测.用于否定句或疑问句中) can not / cannot /can’t do Can-do-? Yes,-can. No,-can’t. could couldn’t do may 可以 可能.或许 祝愿 may not do May-do-? Yes,-may. No,-mustn’t/can’t. might might not do Might-do-? Yes,-might No,-might not. must 必须.应该 肯定.想必 must not/mustn’t do Must-do-? Yes,-must. No,-needn’t/don’t have to. have to 只好.不得不(客观的必须.有时态人称变化) don’t have to do Do-have to do-? Yes,-do. No,-don’t. ought to 应当(表示义务责任.口语中多用should ought not to/oughtn’t to do Ought-to do-? Yes,-ought. No,-oughtn’t. shall 将要.会 用于一三人称征求对方意见 用于二三人称表示许诺.命令.警告.威胁等 shall not/shan’t do Shall-do-? Yes,-shall. No,-shan’t. should 应当.应该 本该 should not/shouldn’t do Should-do-? will 意愿.决心 请求.建议.用在问句中would比较委婉 will not/won’t do Will-do-? Yes,-will. No,-won’t. would would not/wouldn’t do dare 敢(常用于否定句和疑问句中) dare not/daren’t do Dare-do-? Yes,-dare. No,-daren’t. need 需要 必须(常用于否定句和疑问句中) need not/needn’t do Need-do-? Yes,-must. No,-needn’t. used to 过去常常 used not/usedn’t/usen’t to do didn’t use to do Used-to do-? Yes,-used. No,-use(d)n’t. Did-use to do-? Yes,-did. No,-didn’t. II. 情态动词must, may, might, could, can表示推测: 以must为例.must + do(be)是推测现在存在的一般状态进行,must + be doing 推测可能正在进行的事情,must +have done是推测可能已经发生过的事情.

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阅读下面短文,用括号内所给动词的适当形式填空(必要时可加情态动词或助动词)。

Tom worked in the office of Mr Bates.

One day, when Tom got to the office, a letter1._________(wait) for him. He opened it.

“Dear Tom,” the letter said, “I2.________(write) to thank you for your help. You3._________(help) me so much when I came to your office. Here’s a ticket for the big football match.”

Tom looked at the ticket. He could not believe that he had it. Everyone looked forward to4.__________(watch) the match!

“ I must watch the match,” he though. “ I must. I5._______(expect) the big match for 4 year.”

Tom thought and though. He6.________(not put) his heart into any work. Then at twelve o’clock he knew what 7.__________(do).

He went out of the office and called his sister, Jean.

At one o’clock Mr Bates came up to him. “I have bad news for you, Tom. Your sister telephoned just now. Your mother8._______(send) to hospital a moment ago.”

“Thank you,” Tom said. “I will go to the hospital. I 9.________(come) back as soon as possible.”

In fact, Tom 10._________(leave) the office quickly for the football ground. Tom’s ticket was a good one. He could stand near the front.

The next morning, when Tom got to the office, Mr Bates came up to him. “You’re fired(解雇), Tom.” Then he walked away angrily.

“But why?” Tom asked.

Then a girl said, “We saw the match on TV here yesterday! You were on TV! Tom, you had such a good ticket!”

 

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阅读下面短文,用括号内所给动词的适当形式填空(必要时可加情态动词或助动词)
A farmer had some dogs to sell. He painted a sign advertising the dogs. A little boy came up to him and said, “Sir, I want to buy a dog.”
“Well,” the farmer said, “but they【小题1】_____________________ (be) very expensive.” The boy 【小题2】 _____________________ (take) some changes out of his pocket, “I’ve got thirty-nine cents. Is that enough to take a dog?”
“Sure. I have six dogs. You【小题3】 ________________________ (choose) any of them.” Then the farmer whistled, “Dolly!” At once, Dolly ran out of the doghouse followed by four little dogs. Then the little boy’s eyes【小题4】____________________________ (dance) with happiness.
But the boy saw another little dog【小题5】___________________________ (move) out slowly. This one was the smallest. She was trying her best 【小题6】 _________________________ (catch) up with the others…
“I went that one,” the boy said, 【小题7】 ____________________________ (point) to the last one. The farmer was surprised. “She 【小题8】 _________________________ (not run) and play with you like other dogs. Will you still want to buy her?” he said kindly.
Hearing that, the little boy rolled(卷起) up one leg of his trousers. A steel brace(支架) 【小题9】 _____________________ (tie) on both sides of his leg. Looking up at the farmer, he said, “So you see, Sir. I can’t walk very well myself, I 【小题10】 ____________________________ (understand) her. So we will be good friends.”
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