1.一般现在时:主语+do/does(现在分词)

e.gWecleantheroomeveryday.

2.一般过去时:主语+did

e.gWecleanedtheroomjustnow.

3.现在进行时:主语+am/is/aredoing

e.gWearecleaningtheroomnow.

4.过去进行时:was/weredoing

e.gWewerecheaningtheroomat5:00yesterdayafternoon.

e.g5.现在完成时:have/hasdone

Wehavecleanedtheroomalready.

6.过去完成时:haddone

e.gWehadcleanedtheroombeforehearrived.

7.一般将来时:willdo/

e.gWewillcleantheroomtomorrow.

8.过去将来时:was/wereto/woulddo

e.gHesaidhewouldcleantheroomnext.