1.一般现在时: 主语+do/does(现在分词)

e.g We clean the room every day.

e.g We cleaned the room just now.

3.现在进行时: 主语+am/is/are doing

4.过去进行时: was/were doing

e.g We were cheaning the room at 5:00 yesterday afternoon.

5.现在完成时: have/has done