need情态动词的过去式是什么?need情态动词的过去式是什么如can是could

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need情态动词的过去式是什么?need情态动词的过去式是什么如can是could
need情态动词的过去式是什么?
need情态动词的过去式是什么如can是could

need情态动词的过去式是什么?need情态动词的过去式是什么如can是could
做情态动词用的need和must一样,本身没有过去式形式,要表示过去的意思,可以说:need have done sth

英语动词的一般过去时,主要表示:
1.一般过去时表示过去发生的事,动词用过去式:
What did you do yesterday? 你昨天做了什么?
How long did you stay there? 你在那里待了多久?
Did you sleep well last night? 你昨晚睡得好吗?
The baby cried all ...

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英语动词的一般过去时,主要表示:
1.一般过去时表示过去发生的事,动词用过去式:
What did you do yesterday? 你昨天做了什么?
How long did you stay there? 你在那里待了多久?
Did you sleep well last night? 你昨晚睡得好吗?
The baby cried all night. 宝宝哭了一夜。
2.过去式有两类,一类为规则动词,它们的过去式都以现在式加-ed词尾构成,
一般情况下直接加-ed,如work→worked, want→wanted。原词若以字母e结尾,
则只加-d,如: live→lived, free→freed,以“辅音+y”结尾的词,变y为i,
再加-ed,如:cry→cried, marry→married,以重读闭音节结尾,末尾又只有一
个辅音字母者,将该字母双写再加-ed,如:plan→planned, permit→permitted。
另一类为不规则动词,如:do→did, go→went, see→saw, have→had。许多常用
动词都是不规则动词. 我们的网上免费英语不规则动词练习可以帮到你。
过去式的肯定、否定、疑问及简短回答的形式可表示如下:
肯定句
I (He, She, We, You, They) went there by bus.
否定句
I (He, She, We, You, They) didn't go there by bus.
疑问句
Did I (he, she, we, you ,they) go the by bus?
简短回答
Yes, I (He, She, We, You, They) did.
No, I (He, She, We, You, They) didn't.
动词be的肯定、否定、疑问及简短回答形式如下:
肯定句
I (He, She) was there.
We (You, They) were there.
否定句
Yes, I (he, she) was.
we (you, they) were.
疑问句
Was I (he, she) there?
Were we (you, they) there?
简短回答
No, I (he, she) wasn't.
we (you, they) weren't.

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没有

need没有过去时
need做行为动词时过去式是needed

你说的是should~~还有对应的是may和might,,will和would时所以它没有过去式,因为need为情态动词,但可用required替换,我可以给你个例子
All living beings require food.
一切生物都需要食物。
当need为实义动词时,过去式为needed.~

need 作为情态动词没有过去式
作为动词有needed

needed