大机器上的小齿轮
[学长]
问一下need这个词 
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回答：6 浏览：226 提问时间：2006-04-01 09:10
在我的印象里，need是情态动词，后面不能加s，但我不太确定。比如：She need(s) to believe this. 加不加s? 有加s的情况吗？
共
最佳答案
need的用法及注意事项
现行高中课本第二册P25对话部分第12行和课本P28第2行和第5行都有用到need 一词作为行为动词和情态动词以及名词。这些用法都比较复杂，下面作归纳和比较：
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
现行高中课本第二册P25对话部分第12行和课本P28第2行和第5行都有用到need 一词作为行为动词和情态动词以及名词。这些用法都比较复杂，下面作归纳和比较：
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
回答：2006-04-01 10:06
提问者对答案的评价：
感谢小葳的精彩解答
在美国"need"是作实意动词用,不是做情态动词.这是和英国英语的不同点.
for example:
I do not need your help.
He needs my help.
for example:
I do not need your help.
He needs my help.
回答：2006-04-01 12:34
根据语义，动词need 有时当作助动词来使用（如 can 或 may )， 有时象实义动词（如want 或 try )。 当用作实义动词时，need 和主语一致， 把to 放在其后面动词的前面， 在疑问句、否定句或某些特定的造句法上和do 连用：
He needs to go.
他想走。
Does he need to go so soon?
他这么快就要走吗?
He doesn't need to go.
他不需要走。
He needs to go.
他想走。
Does he need to go so soon?
他这么快就要走吗?
He doesn't need to go.
他不需要走。
回答：2006-04-01 12:57
