灵鹊做题网need作为不同词性的各种用法.求详解.
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need作为不同词性的各种用法.求详解.
需要”need 的用法
一、作情态动词
1．need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must或have to;否定答语常用needn't.如：
—3．由must引出的一般疑问句,肯定回答用must,否定答语用needn't或don't have to.如：
二、作行为动词
need 作为行为动词有人称和数的变化,后面可接名词、代词、动名词及带to 的动词不定式；可用于肯定句、疑问句和否定句中
作情态动词一、need表示“需要”或“必须”,通常用于否定句,疑问句,条件句.例如：1．You needn't do it again．你不需要重复做了.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．其实我们不必担心.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 this week．本周树蓠不必要整修.四、其一般疑问句的答语,肯定用must,否定用needn't.Need I go with her?我需要和她一起去吗?Yes,you must.是的,你需要去.No,you needn't.不,你不必去.作实义动词主+need +to do 主+need +doing =sth+need +to be done（都是实义动词,注意其否定为主+don‘t/doesn't+need +to be done或主+needn’t +be done例如：The room needs cleaning = The room needs to be cleaned.房间需要打扫了.另外,“need”作实义动词时后还可以直接跟名词.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",后面大多接动词原形,表示动作；当need为实义动词时,意思是“需要”,否定为"don't need",后面大多跟名词
一、作情态动词
1．need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must或have to;否定答语常用needn't.如：
—3．由must引出的一般疑问句,肯定回答用must,否定答语用needn't或don't have to.如：
二、作行为动词
need 作为行为动词有人称和数的变化,后面可接名词、代词、动名词及带to 的动词不定式；可用于肯定句、疑问句和否定句中
作情态动词一、need表示“需要”或“必须”,通常用于否定句,疑问句,条件句.例如：1．You needn't do it again．你不需要重复做了.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．其实我们不必担心.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 this week．本周树蓠不必要整修.四、其一般疑问句的答语,肯定用must,否定用needn't.Need I go with her?我需要和她一起去吗?Yes,you must.是的,你需要去.No,you needn't.不,你不必去.作实义动词主+need +to do 主+need +doing =sth+need +to be done（都是实义动词,注意其否定为主+don‘t/doesn't+need +to be done或主+needn’t +be done例如：The room needs cleaning = The room needs to be cleaned.房间需要打扫了.另外,“need”作实义动词时后还可以直接跟名词.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",后面大多接动词原形,表示动作；当need为实义动词时,意思是“需要”,否定为"don't need",后面大多跟名词