要根据你选用的句型以及时态来决定用哪个短语或单词，比如：

I should clean the house. 我应该打扫房间。should是情态动词，后接动词原形。

He cleans the house.他打扫了房间。He是第三人称单数，所以用cleans.

She is cleaning the house now.她现在在打扫房间。正在打扫，用现在进行时态。

His mother asked him to clean the house.他妈妈叫他打扫房间。ask sb. to do sth.

如果没解释清楚，欢迎追问！