= =很基本哦
一般来说呢,大多数情况下
to do 表未来
doing表正在干嘛
being done是正在干嘛的被动
had done是过去完成
was doing是过去的正在干嘛
其实吧,只要记住to do表未来,be doing表正在,have done表现在完成,had done表过去完成,然后这几种套来套去,其实就是一个加合罢了.
给你个例子,比方说have been done 就是have done 加be done,就是现在完成时加被动
我高中了 英语单选总是出现① to do ②doing ③done ④being done ⑤had done⑥was
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