情态动词——need的用法

2024-01-29 02:44:42   文档大全网     [ 字体: ] [ 阅读: ]

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情态,动词,用法,need
情态动词——need的用法



“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 例如: The room needs cleaning = The room needs to be cleaned. 房间需要打扫了. 另外,“need”作实义动词时后还能够直接跟名词.请看下面的例子: It is a question that needs very careful

consideration.这是一个需要慎重考虑的问题 很简单的方法区别情态动词与实义动词:当need为情态动词时,意思是“必要”,否定为"needn't",后面大多接动名词,表示动作; need为实义动词时,思是“需要”,否定为"don't need",后面大多跟名词. 作情态动词

1need作情态动词无人称或数的变化, 后接动词原形,多用于否定句和疑问句中.如:You needn't worry.你不必担心.

2.由need引出的一般疑问句,肯定回答常用musthave to;否定答语常用needn't. 如:

Need I answer the question? 我需要回答那个问题吗?

Yes, you must. /Yes, you have to.是的,你必须回答./是的,你得回答./No, you needn't.,不必了.

3.由must引出的一般疑问句,肯定回答用must,否定答语用needn'tdon't have to.如:

Must I do the work now? 我必须现在干这个活吗?

Yes, you must /have to.是的,你必须做./No, you needn't /don't have to. ,你现在不必做.




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