need可以用作名词、动词及情态动词,其用法及考点如下。
1.need可以用作名词
1)need 作名词的意思是“需要;必要;需要之物”。比如:Mother looks after all her children’s needs.
She gives them food and clothes and other things.母亲照料孩子们的一切需求,他给他们吃的,穿得及其它东西。
When need is highest help is highest.雪中送炭真君子。
2)need指“缺少,贫困”。比如:A friend in need is a friend indeed.患难见真情(谚语)。
3)need可与for搭配使用:There is no need for haste.不需要匆忙。
need与of搭配使用:He felt the need of a better education.他感到有必要受到更良好的教育。
Try your friends before you have need of him.不要等到有求于他的时候才去考验你的朋友。
短语in need of是“需要”的意思。比如:The building was in need of repair.这座大楼需要维修了。
need后跟动词不定式:There is no need to send for the doctor.不需要请医生来。You have no need to be ashamed.你无需感到疚愧。
need +for+someone+动词不定式:There is no need for you to hurry.你无需这样匆忙。
2.need做动词
1)need做及物动词时,可指“需要”。比如:I need a hammer and some nails to mend this chair.我需要一把锤子和一些钉子来修理这把椅子。Plants need sun in order to grow.植物生长需要阳光。I need to make a phone call.我需要打个电话。
2)need可以指“缺少,欠缺”。比如:The soup needs salt.这汤里少了点盐。
3)need后跟动词不定式。比如:Does she need to know? 她必须知道吗? He will need to be looked after 必须让人去照料他。
need +someone+动词不定式。比如:I need someone to look after her.我需要有人去照料她。
3.need做情态动词
need做情态动词时表示“须要,必须”,用于劝告或建议。比如:Need I go? Yes, you must.我必须去吗?是的,你必须去。Look, you needn't shout.喂,你不必喊。
4.要点及考点
1)常考need做动词时后面要跟动词的ing形式,主语多为物。比如:My computer needs repairing.我的电脑需要修理。用repairing主动形式,表达了被动意义。也可以说:My computer needs to be repaired。如果跟动词不定式,就要用不定式的被动式。
2)needn’t表示的是“没有义务做某事”。比如:You needn’t go with us if you do not want to.如果你不想跟我们就,就可以不去。