wasn't didn't isn't的用法 各举两个例子
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wasn't didn't isn't的用法 各举两个例子
1.wasn't是be动词isn't的过去时,用于过去进行时.
如:1.he wasn't at home yesterday.
2.I wasn't doing my homework yesterday,I was reading books.
2.didn't是“do" "does"的过去时,用于过去现在时.
如:1.I didn't go to the library last week.
2.he didn't take a shower until his mother came back.
3.isn't是一般现在式,后面一般加动词--ing形式
如:1.he is dancing in the gym
2.is she playing football on the playground?
如:1.he wasn't at home yesterday.
2.I wasn't doing my homework yesterday,I was reading books.
2.didn't是“do" "does"的过去时,用于过去现在时.
如:1.I didn't go to the library last week.
2.he didn't take a shower until his mother came back.
3.isn't是一般现在式,后面一般加动词--ing形式
如:1.he is dancing in the gym
2.is she playing football on the playground?
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