By the time you get to Beijing tomorrow,I ____2____ for Shanghai.By the time you get to Beijingtomorrow,I ____2____ for Shanghai.A) am leavingB) should have leftC) will leaveD) have already left(B)为什么D不可以?

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By the time you get to Beijing tomorrow,I ____2____ for Shanghai.By the time you get to Beijingtomorrow,I ____2____ for Shanghai.A) am leavingB) should have leftC) will leaveD) have already left(B)为什么D不可以?
By the time you get to Beijing tomorrow,I ____2____ for Shanghai.
By the time you get to Beijingtomorrow,I ____2____ for Shanghai.
A) am leaving
B) should have left
C) will leave
D) have already left(B)
为什么D不可以?

By the time you get to Beijing tomorrow,I ____2____ for Shanghai.By the time you get to Beijingtomorrow,I ____2____ for Shanghai.A) am leavingB) should have leftC) will leaveD) have already left(B)为什么D不可以?
此题应该选择将来完成时.
D是过去完成时.
不会可以继续追问

D早已离去 现在完成时 B虚拟语气 将来完成时

have done sth是过去完成时,是指在过去某个时间已经完成了;这里很明显是将来完成时或者一般将来时,所以D不行啦。

have done sth 是现在完成时,是指的现在动作已经完成

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