当前位置:文档之家› Need和dare的用法小结和练习含答案

Need和dare的用法小结和练习含答案

Need/Dare的用法与练习(含答案)
Need的用法
1. need作情态动词
need作情态动词用时,主要用于否定句和疑问句中,形式为need not+原形动词。

(need 辅助后面实义动词,有一定的词义,但不能独立使用)
例:
宾语+ 状语
注意用need 提问时,肯定回答为must,否定回答为needn’t或don’t have to。

例:—Need I finish the work today? (need助动词)
—Yes, you must .是的。

—No. you needn’t /don’t have to. 不,你不必。

2. need作实义动词
作实义动词,need和普通动词一样,有人称、数和时态的变化,后接名词、代词、不定式或动名词做宾语,可用于任何句子。

need肯定陈述句中独立做谓语,而疑问和否定则要借助于do构成。

如:
Do you need a dictionary? 你需要词典吗?
1)如果主语是人,句型如下:sb. need(s) sth. 某人需要某物
sb. need to do sth. 某人需要去做某事
例:I need to pass the exam. 我需要通过这次考试。

He needs to learn English .他需要学习英语。

You need my help.
主语+
2)如果主语为某物
某物需要某种方法处理时,need之后可接不定式短语,但一定为被动语态;也接doing,但一定为主动语态。

句型如下:Sth. need doing 某事需要被做
= need to be done
特别注意两点:
①.主动形式的动名词doing具有被动的含义;也接动名词,但一定为主动语态。

②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。

例如:.
例:The flowers need watering.
= The flowers need to be watered. 这些花需要浇水。

同理:
→The window needs to be fixed.(√正确)
=The window needs fixing.(√正确)
(这窗子需要修理。


The window needs being fixed.(Х错误)
3. 表过去状况时
a. didn’t need to+原形动词表示“当时不必⋯⋯(而且亦未如此做)”,直陈语气
例:He didn’t need to attend the party, so he stayed home.
(当时他不必参加派对,所以就留在家里。


b. need not have+过去分词表示“当时不必⋯⋯(但却如此做)”
例:He needn’t have attended the party, but he went there just the same.
(当时他可以不必参加派对,但他还是去了。


后者也就是虚拟语气:needn't +完成式“表示本来不必做某事而实际上做了某事”。

例:You needn't have waited for me.
4. 注意need在反意疑问句中的变化
a.实义动词,就是一般动词,需要加do/does/did构成。

例:He needs to go, doesn’t he? (needs为动词)
(他需要去,不是吗?)
He doesn’t need to go, does he?
(他不必去,对吧?)
b.情态动词,直接用need构成
例:He need not go, need he? ( need与not连用,情态动词,就是助动词)(他不必去,对吗?)
Dare的用法(语法成分与need相同)
1. dare作情态动词
作情态动词用时, 常用于疑问句、否定句和if/whether从句中, 没有人称和数的变化,但是有过去式(dared),后接动词原形。

例:How dare you say I’m unfair?
He daren’t speak English before such a crowd, dare he?
If we dared not go there that day, we couldn’t get the beautiful flowers.
I wonder whether he dare do it.
反意疑问句中:He daren't speak English before such a crowd, dare he?
2. dare作实义动词
可作实义动词用时,即一般动词,具有人称、时态和数的变化。

在肯定句中,dare后面常接带to的不定式。

在疑问句和否定句中,dare后面可接带to或不带to的不定式。

例:Do you dare to walk in the dark? 你敢黑夜走路吗?
He doesn't dare (to) meet his teacher’s eyes. 他不敢与老师对视。

He dared to go.(当时他敢去。


3. 习惯用法:
a. I daresay + (that)从句我敢说⋯⋯ (daresay是一个词,亦可作dare say)
例:1 daresay he will be late again.(我敢说他又会迟到。


b. How dare + 一般陈述句? ⋯ ⋯怎敢⋯⋯?
例:How dare you say such a thing to me?
(你怎敢在我面前说这种话?)
练习
1. You _______ worry about me. It’s nothing serious.
A. can’t
B. mustn’t
C. needn’t
D. won’t
2. What a beautiful day! You ___ take your umbrella at all.
A. can’t
B. needn’t
C. mustn’t
D. may not
3. ---Must I return the book by the end of next month?
---____. you can keep it as long as you like.
A. No, you mustn’t
B. No, you can’t
C. Yes, you have to
D. No, you needn’t
4. My little son ____ out alone at right.
A. dare not to go
B. dares not to go
C. doesn’t dare to go
D. dares not go
5. ---Sorry, I am late.
---Why, you ____ to the company today, for it is Sunday.
A. couldn’t have come
B. needn’t have come
C. needn’t come
D. didn’t need to come
6. ---Do you want to buy a big apartment?
---Well, it ___ be big ---that’s not important.
A. mustn’t
B. needn’t
C. can’t
D. won’t
7. After the glasses fell to the ground and broke, the little boy ___ his grandma about it.
A. dare not tell
B. dare not telling
C. dare not to tell
D. didn’t dare to tell。

相关主题