what a nice computers!what a clever boy he is!后面的为什么要加he is?

What a clever boy he is! what a clever boy he is 单词a boy clever what is he 组成英语句子 请问感叹句How clever a boy he is和what a clever a boy he is两句话意思是一 (how/what a )clever the boy is! he is a very clever boy How clever a boy he is! He is a clever and lively boy 改错：What good a boy he is! what a fast boy he is! what a handsome boy he is 为什么不能说 how clever a boy he is