不等于!
what were you doing yesterday?
意思是：你昨天正在干什么?
强调过去正在进行的动作.
what did you do yesterday?
意思是：你昨天干了说明?
只是强调过去的动作.
what were you doing yesterday?等于what what did you do yesterday?
what were you doing yesterday?等于what what did you do yesterday?
英语人气：412 ℃时间：2019-11-20 12:16:15
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