过去将来完成时:(would have done) 例:I believed by the end of that year an advanced version of that software would have been developed, but I was wrong. 我坚信到那年年底为止,那个软件的新版本将被开发出来。但是我错了。 16 过去将来完成进行时:(would hav...
A. have you been doing B. have you done C. were you doing D. did you do 2) ––– Hi, Tracy, you look tired. ––– I am tired. I ___ the living room all day. A. painted B. had painted C. have been painting D. have painted 3) I...
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