作业帮英语被动句中need的用法
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/16 14:25:03
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
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!
再问： 是的，好的话我会加分的
再答： 你看看是否还有疑问。
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!
再问： 是的，好的话我会加分的
再答： 你看看是否还有疑问。