如何区分need是作为情态动词还是实义动词

Question

如题所述

Answer 1

need作情态动词时，后面接的是动词的原形，主要用于否定句和疑问句，如：
'I'll put the key in the window.' — 'You needn't bother,' he said gruffly.
“我会把钥匙放在窗户里。”——“不必麻烦了，”他粗声说道。
Look, you needn't shout.
嗨，你不必大喊大叫。
She need not know I'm here.
她不必知道我在这儿。
You needn't worry.
你不必担心。
This needn't take long, Simon.
西蒙，这花不了多长时间。
Buying budget-priced furniture needn't mean compromising on quality or style.
买价钱经济的家具并不意味着就要牺牲质量和样式。
Loneliness can be horrible, but it need not remain that way.
孤独可能会很可怕，但也并非一定如此。
He need never drink again if he doesn't want to.
如果他不想喝酒的话，他可以永远不再喝了。
need作实意动词，后面可以接名词或带to动词不定式，可以用于肯定句，否定句或疑问句的形式。
He desperately needed money.
他迫切需要钱。
These diets provide everything your body needs.
这些饮食提供了你身体需要的所有营养。
I need to make a phone call.
我要打个电话。
A baby does not need to wear shoes until he starts to walk.
婴儿直到开始走路后才需要穿鞋。
I need you to do something for me.
我需要你为我做点儿什么。
I need you here, Wally...
我这儿需要你，沃利。
I need you sane and sober.
我要你清醒、冷静。

Answer 2

作为情态动词的“need”的用法与其他情态动词“can”,“may”,“must”的用法基本相同：在限定动词词组中总是位居第一,没有非限定形式,即没有不定式、-ing分词或-ed分词等形式；第三人称单数现在时没有词形变化；情态动词之间是相互排斥的,即在一个限定动词词组中只能有一个情态动词.下面是“need”作为情态动词的用法：
一、need表示“需要”或“必须”,通常用于否定句和疑问句.例如：
1．You needn't do it again．你不需要再做了.
2．He needn't worry about it．这件事他无需担心.
3．Need he do this homework first?他需要先做这些作业吗?
4．Need they fill in the form?他们需要填表吗?
二、在否定句中,可以用need的否定形式＋不定式完成体.例如：
1．We needn't have worried．其实我们不必要慌.
2．You needn't have mentioned it．你本来不必提起这件事.
3．You needn't have said that when he asked．当他问的时候,你其实不必要说.
三、needn't后的不定式间或也能用进行式或被动语态.例如：
1．He needn't be standing in the rain．他不必要站在雨中.
2．We needn't be waiting in this place．我们不必要在这儿等.
3．The hedges needn't be trimmed thisweek．本周树蓠不必要整修.
“need”作为实义动词时,通常用法是：
人＋need ＋to do
物＋need ＋doing
物＋need ＋to be done
另外,“need”后还可以直接跟名词.请看下面的例子：
1．We need to collect the parcel before we leave for England．去英国之前,我们需要收拾好行李.
2．We need to tell him the truth．我们需要告诉他真相.
3．My car needs repairing．我的汽车需要修理.
4．The flowers need watering．这些花需要浇水.
5．His leather shoes needs to be mended．他的皮鞋需要修补.
6．Her room needs cleaning．她的房间需要打扫.
7．It is aquestion that needs very careful consideraton．这是一个需要慎重考虑的问题
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Answer 3

Need的用法
Need有两种用法,可以用做特殊动词,或者用做普通动词,二者不可兼用.
特殊动词need只用于疑问句和否定句,用来表示有必要吗或没必要.肯定式是must.
不能接名词,只能和普通动词不定式构成合成谓语,无人称和时间变化.
Need you go there now
Yes,I must .No,I needn’t.
普通动词need不能提前疑问也不能加not否定,含义是需要.疑问和否定要借助于特殊动词do.可以接名词做宾语.也可以跟to do(=have to do) ,doing 做宾语.有时间和人称变化.跟-ing做宾语时,其主语往往是物,主动形式表被动结构.
I need to use the bathroom.
Do you need to have a book
Yes,I do .No,I don’t need to have a book.
I need a book.
Do you need a book
Yes,I need a book.No,I don’t need a book.
She needs your help.
Does she need your help
Yes,she does.No,she doesn’t.
He needed to take a taxi,or he would be late.
Did he need to take a taxi
Yes,he did.No,he didn’t.
Your shoe needs mending .
Does your shoe need mending
Yes,it does.No,it doesn’t.

Answer 4

need 做情态动词：1） need+动词原形
注意，情态动词的need 没有加s 的用法
need 做实义动词： 1） need to do sth 2) need sth
注意：need此时可以随主语和时态变化---needs, needed

Answer 5

need作为情态动词时，后面加动词原形，实意动词加to do不定式。