赶紧收藏吧!: bookmarkBookmark and Share




Need 的用法

Need 的用法
Ⅰ.用作行为动词
1. 后接宾语,由名词充当,但宾语只能用主动式-ing形式或不定式的被动式来表示被动的意义,例如:
I need a new suit to take part in the wedding.
The house needs repairing (= to be repaired.)
但the house needs being repaired.
和The house needs to repair. 都是错误的句子。
2. 可带复合结构,其宾语补足语可以是:
1). 副词:Do you need the book back now?
2). 过去分词:I need my recorder repaired.
3). 不定式:We shall need two buses to meet the people at the station. (SBⅠ-97)
Ⅱ.用作情态动词
1. 一般用于疑问句和否定句,不用于肯定句,过去式与原形一样,例如:
Need he go yesterday? (=Did he need to go yesterday?)
He needn’t go last week. (= He didn’t need to go last week.)
2. 用于疑问句时,表示说话人期盼否定的答复,试比较:
Must I go now, mother? (对方作出肯定或否定的回答都无所谓)
Need I go now, mother? (期望对方作出否定的答复)
3. need 不能用于疑问词之后,例如:
Where must I put it? (不能说:Where need I put it?)
4. need 的肯定式可用于否定意义的简单句中,但必须于否定副词hardly、never、scarely、seldom、rarely等连用,例如:
Though we are all different, we need never be separate. (SBⅡ-79)
I hardly/scarely need say how much I enjoyed the holiday. (Eckersley)
5. need的肯定式可用于否定概念的主句后或宾语从句及含有否定意味的连词before 引起的从句中(谓语动词)必须为肯定式,例如:
I don’t think you need leave yet.
It’s clear that he need never trouble to get up at 7:30 again. (Wells)
There was another hour before I need go out into cold.
6. need 的肯定式可用于以疑问词引起的宾语从句、定语从句、条件从句及比较状语从句等表示非判断的结构中,例如:
All you need do is to take a taxi from the airport.
Do you stay longer than you need.
7. need 在间接引语中仍用原来的形式,表示过去时态时不加-ed,例如:
He was told that he needn’t do it.
Ⅲ.用作名词
1.表示“困乏之境、缺乏、需要”之意,不可数,常带不定式或介词短语作后置定语,例如:
There is no need to use a dictionary.
There is no need for a dictionary.
There is no need of a dictionary.
He has need to exercise daily. (MD)
2.用于短语
We are in (great) need of a large sum of money.
A friend in need is a friend indeed.
Most of the people were in great need. (贫穷、家境困难)
If need be (如果有必要),help him (to) do it.
You can take money from the bank as /if the need arises. (必要)
He gave me help at my need. (在我有困难时)
In case of need I will help you. (如果有需要)
3.用来表示“需要、需求之物”的意思,为可数名词,例如:
My needs are few. (我的要求很少)
$100 will meet my immediate needs. (一百美元可应付我目前的需要)
Ⅳ.其它方面
needful adj 需要;必须的
needless adj 不需要的;不必要的
needy adj (=very poor) 非常贫穷的;缺乏生活必需品的

0 评论:

发表评论

相关文章