由连接代词或连接副词加不定式组成的宾语从句

* We can't decide whom to vote. 我们不能决定该邀请谁。
* He gave a lesson on how to improve soil. 他讲了一堂关于怎样改善土壤的课。
* We must decide what to do with her. 我们必须决定怎么处置她。