问题描述:
不知道
最佳答案:
一、用作情态动词
need做为情态动词一般用于否定和疑问句中。否定句在need后加not,变为疑问句将need置于句首。
1. 通常用在疑问句、否定句中,或与条件句whether, hardly, nobody等连用。
need+do,否定needn’t +do
Need he go so soon? 他这么快就要走吗?
He needn’t go.他不必走。
2. need引导的疑问句,肯定回答要用must。
—Need I hand it in right now? 我需要现在就交吗?
—Yes, you must.是的,需要现在交。
—No, you needn’t.不,不需要现在交。
3. need have done 的否定式或疑问式,表示“本来不必做某事,但事实上却做了”。
You needn’t have helped me because I could make it.
你本没必要帮我的,我自己可以做到。
二、用作实义动词
1、语法结构:sb.+need+sth.,意思为“需要...某物”。如:
I need some help. 我需要一些帮助。(肯定句)
Do you need more money? 你需要更多的钱吗?(疑问句)
2、语法结构:sb.+need+to do sth.,意思为“需要做....,有必要做...”。如:
I need to sleep. 我需要睡会儿觉.
I need to make a phone call.我要打个电话.
Do I need to go at once? 我需要马上走吗?
3、语法结构:sb.+need+sth. to do sth.,意思是“需要...做某事”。如:
I need you to help me. 我需要你来帮助我。
He needs time to do homework.他需要时间做他的家庭作业。
4、语法结构:sth.+need doing = sth.+need to be done,意思是“(东西)必须被...”。如:
The house needs cleaning. = The house needs to be cleaned. 这房子需要打扫。
The TV needs mending. = The TV needs to be mended. 电视需要修理了。
三、用作名词
1、语法结构:in (gread) need of,意思为“需要、急需”。如:
Are you in need of help? 你需要帮助吗?
We are in great need of Grade A.我们急需一等品。
We are in great need of some English novels.我们急需一些英文小说。
2、语法结构:meet sb's needs,意思为“满足某人的需要”。如:
In the next five years, we will resolutely advance the reform of the public finance system, so that people's money will be better spent to meet their needs.
在今后5年,我们要下决心推进财政体制改革,让人民的钱更好地为人民谋利益。
3、语法结构:There is no need to do sth.,意思是“没有必要做...”,如:
There’s no need for you to wait.你不需要去等待。
There is no need to go so early. 何必去那么早。
There is no need to immerge further into this topic. 没必要再深钻这个题目了。
拓展内容:needn't have done是做了……而本不必做(表示过去发生过的事,事实上没有必要)
I need not have got up so early. 我本来不必那么早起床的(但事实上已早起床)。