need的用法初中学的要初中学的,thanks
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need的用法初中学的要初中学的,thanks
need的用法初中学的
要初中学的,thanks
need的用法初中学的要初中学的,thanks
need兼有动词/名词两者词性.
1.need作为名词时,初中涉及较少,所以只提供几个常见结构以供参考:
1)in need of...需要...
如:I'm in need/want of your help.
2)in need 有需要的/困窘的
如:A friend in need is a friend indeed.
3)There be no need of/for sth.
There be no need (for sb) to do sth .是不需要的/不必...
如:There is no need of/for further discussion.
There is no need for you to help him.
2.need作为动词,有两种理解,一是做情态动词,二是做行为动词.
1)need作为情态动词时,一般不用于肯定句,只用于否定句/疑问句.
其后直接加动词原形,没有时态/人称的变化.
其否定句为在need后面直接加not,或使用缩写needn't.
如:I needn't work hard.
其疑问句必须把情态动词need提前,回答也一般借助于need.
如:Need I help you?
2)need作为行为动词时,可用于各种句子,有过去式needed和三单形式needs.
其否定句必须借助于助动词don't/doesn't/didn't等变化.
如:I don't need to work hard.
其疑问句也必须借助于助动词do/does/did等变化.
如:What do you need me to do?
其结构一般有:
need sb/sth 如:I need you.I need your help.
need to do sth 如:I need to work harder.
need sb to do sth 如:I need you to help me.
need doing = need to be done 如:My watch needs repairing.= My watch needs to be repaired.
做情态动词时,need+do. 作实义动词,need+to do
① 作为一个行为动词,表动作。 e.g.
I need your help.
He doesn't need to go to school today.
② need作为情态动词 +动词原形。
A: Must I go home now?
B: No, you needn't.
温馨提示:
needn't =don't have to ...
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① 作为一个行为动词,表动作。 e.g.
I need your help.
He doesn't need to go to school today.
② need作为情态动词 +动词原形。
A: Must I go home now?
B: No, you needn't.
温馨提示:
needn't =don't have to 表示委婉,“可做可不做”。
我的是初中知识点!
祝你进步!
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