how old do you think he is?和who do you think is the best student in the class?为什么不一样?

问题描述:

how old do you think he is?和who do you think is the best student in the class?为什么不一样?

不一样.
如果把第2句改:who do you think the best student in the class is 应该就一样了.
而且第2句不光用best修饰,还多了个宾语从句in the class来修饰.