一般现在时 be,do/does
一般过去时 was/were,did
一般将来时 will,be going to
现在进行时 be doing
过去进行时 was/were doing
将来进行时 will be doing
现在完成时 have/has done
过去完成时 had done
现在完成进行时 have/has been doing
过去完成进行时 had been doing