一般现在时~DO
一般过去时~DONE
一般将来时~SHALL/WILL DO
过去将来时~SHOULD/WOULD DO
现在进行时~BE(AM/ARE/IS) DOING
过去进行时~WAS/WERE DOING
将来进行时~SHALL/WILL BE DOING
现在完成时~HAS/HAVE DONE
过去完成时~HAD DONE
现在完成进行时~HAS/HAVE BEEN DOING