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. |
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