She is always boasting about how wonderful her children are.这句话中 how wonderful her children are应该是感叹句,同时也是宾语从句,既然是宾语从句,那么怎么还会用介词引导呢?

问题描述:

She is always boasting about how wonderful her children are.
这句话中 how wonderful her children are应该是感叹句,同时也是宾语从句,既然是宾语从句,那么怎么还会用介词引导呢?