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Was的意思和用法是什么?

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Was的意思和用法是什么?
Was的意思和用法是什么
解题思路: 此题属记忆性知识的考查,平时注意知识的积累并加强练习
解题过程:
was 是be动词is和am的过去式,需在过去时使用,与is、am用法一致,表示单数,用于I,he,she,it以及单个人作主语的句子。
例如:
I was born in 1998.
He was a doctor three years ago.
She was at home yesterday.
It was Monday yesterday.
Mike wasn't at home this morning.
补充:
were 是be动词are过去式,需在过去时使用,与are用法一致,表示复数,用于you, they, we 以及两个以上的人作主语的句子。
例如:
You were at home yesterday.
They were at the playground an hour ago.
We were singing in the room an hour ago.