对上一则的补充
一般现在时 do
现在进行时 am/is/are doing
现在完成时 have/has done
现在完成进行时 have/has been doing
一般过去时 did
过去进行时 was/were doing
过去完成时 had done
过去完成进行时 had been doing
一般将来时 will do
将来进行时 will be doing
将来完成时 will have done
将来完成进行时 will have been doing
一般过去将来时 would do
过去将来进行时 would be doing
过去将来完成时 would have done
过去将来完成进行时 would have been doing