.I love the girl who is reading a book under the tree.
宾语丛句 是用来修饰宾语的。造句时，首先要有一个主干句，比如上面的主干就是“ 我喜欢那个女孩儿”，“ 女孩儿”就是 宾语。 “who is reading a book under the tree”就是对女孩儿进行修饰的。
2.LiMing lives in Beijing where is capital of China.
此句中主干是 “李明住在北京”。 “where is capital of China”是对北京进行修饰。
注意：宾语从句的连接词 可以是 that who where
I don't know what you mean.
She asked me where she can find a bookshop.
If you get closer, you will be able to see clearly who she is talking to.
Could you please tell me how to use this machine?
The teacher told us that our team was the winner.
追问过去将来时态呢