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注：① 若要強(qiáng)調(diào)從不習(xí)慣到習(xí)慣的過程，可用 get, become 等代替動(dòng)詞 be：

He has got used to looking after himself. 他已習(xí)慣于自己照顧自己。

② be used to 有時(shí)可能是動(dòng)詞 use 的被動(dòng)語態(tài)結(jié)構(gòu) (此時(shí)意為“被用來”，其中的 to 為不定式符號(hào)，其后要接動(dòng)詞原形)：

A hammer is used to drive in nails. 錘子是用來釘釘子的。

5. used to 與would的用法比較：

(1) 兩者都表示過去的習(xí)慣，當(dāng)表示過去習(xí)慣性的動(dòng)作時(shí)，可互換：

When we were children we would [used to] go skating every winter. 我們小時(shí)候，每年冬天都去溜冰。

(2) 若表示過去持續(xù)的狀態(tài)，通常只用used to，不用would：

He used to like you. 他原來還是喜歡你的。

He is not what he used to be.  他已不是從前的他了。

(3) 若要強(qiáng)調(diào)過去與現(xiàn)在的對(duì)比，也通常只用used to：

I don’t smoke these days, but I used to. 我現(xiàn)在不抽煙，但我以前是抽的。

I used to drive to work but now I cycle. 過去我常駕車上班，但我現(xiàn)在騎自行車。

十、had better 的用法

1. 基本用法特點(diǎn)

其意為“最好”、“應(yīng)該”，后接動(dòng)詞原形，與情態(tài)動(dòng)詞should用法相似，其中的had通常縮略為 ‘d：

You’d better get some sleep．你最好去睡一會(huì)兒。

We had better go before it rains.                 我們最好在下雨前就去。

2. 如何構(gòu)成否定式和疑問式

構(gòu)成否定式時(shí)，通常將not置于had better之后(而不是had之后)；而構(gòu)成疑問式時(shí)，則通常將had(而不是had better)置于主語之前：

I’d better not disturb him．我最好別去打擾他。

What had we better do? 我們最好怎么辦?

注：在否定疑問句或反意疑問句中可將 not 與 had  連用：

Hadn’t we better go now? 我們是不是現(xiàn)在就去呢?

3. 后接進(jìn)行式和完成式動(dòng)詞

有時(shí)后接動(dòng)詞的進(jìn)行式，表示最好馬上做某事；也可接完成式動(dòng)詞，表示最好做完某事或本該做某事而未做某事：

I think I’d better be going．我想我最好還是馬上走。

You’d better be getting your clothes ready. 你最好馬上把衣服準(zhǔn)備好。

You had better have done that. 你最好把那事做完。

You had better have stayed here. 你本來應(yīng)該呆在這兒的。

4. 幾點(diǎn)用法說明

(1) had better 用于提出建議或請求時(shí)，并不是一個(gè)很客氣委婉的表達(dá)，它暗示對(duì)方有義務(wù)去做某事，因此通常用于長輩對(duì)晚輩或上級(jí)對(duì)下級(jí)等，而不宜反過來用。

(2) had best與had better 用法和含義均差不多，但不如had better普通：

You had best get home before midnight．你最好在午夜之前回到家里。

We had best be going．我們最好現(xiàn)在就走。

(3) 有時(shí)可省略其中的had：

You better stop arguing．你們最好不要爭論了。

Better not wait for him. 最好不要等他了。

Better say yes, if they ask you. 如果他們問你，你最好說“是”。

(4) 有時(shí)為了強(qiáng)調(diào)，可將better置于had之前：

"I promise I’ll pay you back." "You better had." “我何證還給你。”“你最好還給我。”

十二、高考重要考點(diǎn)精練

1. The police still haven’t found her, but they’re doing all they _____.

A. may                     B. can                       C. must                     D. will

2. It’s a very kind offer, but I really ______ accept it.

A. mustn’t                B. needn’t                 C. can’t                    D. don’t

3. Their answers are exactly the same — one of them _____ from the other.

A. must copy             B. must have copied   C. could copy            D. should have copied

4. We ______ a worse day for the picnic — it rained nonstop.

A. couldn’t pick        B. couldn’t have picked

C. might pick            D. might not have picked

5. “Where’s the library?” “I ______ know.”

A. couldn’t               B. wouldn’t               C. didn’t                   D. mightn’t

6. That car nearly hit me; I _______. (www.hz123456.com)

A. might be killed      B. might have been killed

C. may be killed        D. may been killed

7. You ______ him the news; he knew it already.

A. needn’t tell           B. needn’t have told   C. mightn’t tell    mightn’t have told

8. You _______ practise the drums while the baby is sleeping.

A. needn’t                 B. mightn’t               C. mustn’t                 D. won’t

9. Are you still here? You _______ home hour ago.

A. should go             B. should have gone   C. might go               D. may have gone

10. As she’s not here, I suppose she _______ home.

A. must go                B. must have gone     C. might go               D. might be going

11. “I thought you wouldn’t mind.” “Well, as a matter of fact I don’t, but you _____ me first.”

A. should ask            B. should have asked

C. must ask               D. must have asked

12. “Do you think he is lazy?” “I _____ once, but I don’t now.”

A. may have thought  B. can have thought   C. may think             D. might think 

13. The soldiers tried their best and did what they could ____ against the flood.

A. fight                    B. to fight                 C. fighting                D. fought 

14. You _____ be right, but I don’t think you are.

A. can                      B. could                    C. must                     D. should 

15. “I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”

A. must be                B. must have been 

C. might be               D. can have been     

參考答案：1—5 BCBBB  6—10 BBCBB  11—15 BABBB

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