如题所述
ing形式
He
is
doing
his
homework
now.
现在正在做功课。。。用现在进行时
过去式
He
did
his
homework
yesterday.
以前的,就用过去时
。。昨天做了作业。。。
He
is
doing
his
homework
now.
现在正在做功课。。。用现在进行时
过去式
He
did
his
homework
yesterday.
以前的,就用过去时
。。昨天做了作业。。。
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