谓语形式(以do为例)
一般现在时 do /does
一般过去时 did
一般将来时 shall/will do
过去将来时 should/would do
现在进行时 am/are/is doing
过去进行时 was/were doing
将来进行时 shall/will be doing
过去将来进行时 should/would be doing
现在完成时 has/have done
过去完成时 had done
将来完成时 shall/will have done
过去将来完成时 should/would have done
现在完成进行时 has/have been doing
过去完成进行时 had been doing
将来完成进行时 shall/will have been doing
过去将来完成进行时 should/would have been doing