英语被动句中need的用法

作情态动词和实义动词时用法一样吗

需要较全面、比较准确的回答吗?可以等着看我的回答哦!很快就补充上来。
一、用作情态动词
像绝大多数情态动词一样,没有人称和数的变化,后面接动词原形。主要使用于疑问句和否定句,也可以用于陈述句
1、否定式:直接在need后面加not,缩写为 needn't,表示【不必】。
疑问式:直接将need提前到句子开头。
后面搭配:动词原形。
这三点是区分情态动词还是实义动词的常用标准。
例如:
——Need I come over to help you with the work?
——Thanks, With Tom helping us,you needn't .
You need finish the job before six a.m.
2、情态动词常考形式(见例句):
①——Must he stay with us this evening?
——No,he【needn't/doesn't have to】.
表示【不必】,要用needn't,don't have to,而不能用mustn't(禁止;不许)。
②You【 needn't have told】 him the news,for he had been informed of it by his friends.
needn't have+过去分词
表示【过去本来没有必要做某事(却做过了)】。
二、实义动词
这时,它的用法和其他实义动词一样,都有人称和数的变化,后面需要接带to不定式
1、 否定式:加助动词 do,did,does来表达。
疑问式:将助动词do,did,does提到句子开头,后面用动词原形。
后面搭配:带to不定式(在否定式中,不定式符号to可以省略)。
例如:
We need to do more practice.
She needs another pen to write her homework with.
——Does he need to go to school on this Friday evening?
——No,he doesn't.
2、need表示“需要”,用法类似于want,require
The computer needs【 repairing.(主动式表示被动)】
=The computer needs 【to be repairesd 不定式被动式】。
3、被动结构的用法:
More new book 【are needed 】in our school library.
The work 【needs to be done 】at once.
三、need作名词的典型用法:
1、【There is no need】 for you to come again.
2、We 【are in great need 】of this kind of reading materials.
3、A friend in need is a friend in deed.【谚语】
患难见真情/患难朋友才是真正的朋友。

个人精心总结,纯粹手工制作。希望能够帮助你!

祝你开心如意!追问

是的,好的话我会加分的

追答

你看看是否还有疑问。

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第1个回答  2013-05-14
一、作情态动词

1.need作情态动词无人称或数的变化, 后接动词原形,多用于否定句和疑问句中。如:You needn't worry.你不必担心。

2.由need引出的一般疑问句,肯定回答常用must或have to;否定答语常用needn't. 如:

—Need I answer the question? 我需要回答那个问题吗?

—Yes, you must. /Yes, you have to.是的,你必须回答。/是的,你得回答。/No, you needn't.不,不必了。

3.由must引出的一般疑问句,肯定回答用must,否定答语用needn't或don't have to。如:

—Must I do the work now? 我必须现在干这个活吗?

—Yes, you must /have to.是的,你必须做。/No, you needn't /don't have to. 不,你现在不必做。

二、作行为动词

need 作为行为动词有人称和数的变化, 后面可接名词、代词、动名词及带to 的动词不定式;可用于肯定句、疑问句和否定句中,如:She needs help.她需要帮助。I don't need to see the doctor.我不需要看病。—Do you need to go at once? 你需要马上走吗?

—Yes, I do.是的,我得马上去。

—No, I don't.不,不用马上走。
第2个回答  2013-05-14
您好,嘟咕噜王110!
主语和宾语换个位置 动词前面加be动词 动词变成被动形式通常后面加ed 如果主语是动作的承受者或者是说动作不是由主语而是由其他人完成的则用被动语态。主动语态→被动语态 1、找到该句宾语必须是在谓语动词后的将它提到句子开头。 2、用被动语态结构be+Vt过去分词构成句子。 3、把原句的主语用by构成的介词短语带出也可不加。 egI finished my homework yesterday. →My homework was finished (by me) yesterday. 特殊形式 1、部分Vi加上适当介词可当作Vt构成被动语态。 egParents look after their children carefully. →Children were looked after (by parents) carefully. 2、联系动词没有被动语态。egThe water feels warm. 3、在主动语态中一些省略to的动词不定式改为被动语态时需加上to。 egTeachers often make him stand outside. →He is often made to stand outside (by teachers). 4、have、let等动词无被动语态。 必要时have可改为heldlet sb to do sth可改为be allowed to do sth (被允许做某事

望采纳,谢谢!
咦—选我不?追问

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复制来的,对吧,别来敷衍我

追答

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追答

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第3个回答  2013-05-14
be needed to ,和一般动词一样
第4个回答  2013-05-14
sth need to be done/need doing追问

作情态动词和实义动词时用法一样吗

追答

1need为实义动词时后面加 to do ;否定形式是don't /doesn't/didn't need

2 need为情态动词时后面加do,否定形式是needn't

追问

是在被动时态的用发啦

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