Question

need的用法 越详细越好~~

Answer 1

need作为动词，有两种理解，一是做情态动词，二是做行为动词。\x0d\x0a1）need作为情态动词时，一般不用于肯定句，只用于否定句/疑问句。\x0d\x0a其后直接加动词原形，没有时态/人称的变化。\x0d\x0a其否定句为在need后面直接加not，或使用缩写needn't.\x0d\x0a如：I needn't work hard.\x0d\x0a其疑问句必须把情态动词need提前，回答也一般借助于need.\x0d\x0a如：Need I help you?\x0d\x0a2）need作为行为动词时，可用于各种句子，有过去式needed和三单形式needs.\x0d\x0a其否定句必须借助于助动词don't/doesn't/didn't等变化。\x0d\x0a如：I don't need to work hard.\x0d\x0a其疑问句也必须借助于助动词do/does/did等变化。\x0d\x0a如：What do you need me to do?\x0d\x0a其结构一般有：\x0d\x0aneed sb/sth 如：I need you. I need your help.\x0d\x0aneed to do sth 如：I need to work harder.\x0d\x0aneed sb to do sth 如：I need you to help me.\x0d\x0aneed doing = need to be done 如：My watch needs repairing. = My watch needs to be repaired

Answer 2

Answer 3

一、need作情态动词的用法：
need用作情态动词时表“必须必要”的意思,后直接跟动词原型,且need无人称、数的变化（第三人称单数不加s）,也没有非谓语形式（不定式、分词）.
注意:
need用作情态动词时常用于否定句和疑问句中.
例：Need he bring his laptop tomorrow?明天他必须带他的笔记本过来吗?
Come on,you needn't worry about it becuse it's not your fault.行啦,你不必担心的因为那不是你的错.
She needn't have arrived so early,need she?她本不必到得这么早,不是吗?
注意:
must引导的一般疑问句的否定回答必须使用needn't.例如：
-Must I leave?我必须离开吗?
-No,you needn't.不,你不必离开.
二、need作实意动词的用法：
1、need + something 需要某物
例：I need some fruits to eat.我需要些水果来吃.
2、need to do something 需要做某事
例：You don't need to have the bike repaired right away.你不必马上去修车.
3、need doing = need to be done 需要……
例：The room needs cleaning = The room needs to be cleaned.房间需要打扫了.
4、need somebody to do something 需要某人做某事
例：I need someone to help me out of this problem.我需要找人来帮助我解决这个问题.
三、need作名词的用法：
need用作名词时,既可以是可数名词,也可以是不可数名词.主要常用句型如下：
1、(There's) no need to do something 没必要做某事
例：There's no need to cover such a long distance.没必要走那么远的距离.
There's no need for me to break the window because I have the key.我没必要打破窗户因为我有钥匙.
No need to run since we're not pressed for time.不必跑啦,我们 又不赶时间.
也可以单独使用：There's no need.意思是“没有必要”.
2、in (great) need of （非常）需要
例：The rescue team is in great need of medicine.救援小组非常需要药品.
3、if need be 如果需要的话
例：If need be,I'm going to do you a favor.如果需要的话我会帮你的.
四、关于need的一些短语、俚语用法.
1、A friend in need is a friend indeed.患难之交才是真朋友.