【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《need的用法》,欢迎阅读!
need作为情态动词(像can,must)的时候,后面加动词原形 例:
(1)肯定句 You need do that. (2)否定句 You needn't do that. (3)疑问句 Need I do that?
当need作为使役动词(行为动词)时,后面加名词或动词不定式加to do sth. 例:
(1)肯定句 I need your help.
(2) 否定句 I don't need your help (3) 疑问句 Do you need my help?
(1)肯定句 I need to finish my homework.
(2)否定句 I don't need to finish my homework.
(3)疑问句 Do you need to finish your homework?
“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,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。
编辑本段“need”作为实义动词时,通常用法是
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。
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