请问How tall a boy he is 为什么

请问How tall a boy he is 为什么 If a boy is five tall, how tall is he in meters? If a boy is six feet tall,how tall is he in meters?1 foot=0. He is as a tall boy as he is. 为什么不能说 how clever a boy he is e.g.He is a very tall boy. he a boy is tall(?)连词成句 How clever a boy he is! ‘how tall is he?’ 能说成 ‘he is how tall?’ ( ) a tall mam he is what how what is He is a tall thin boy.(对画线部分提问)(画线部分是a tall thin boy)_ _ he He is a tall,thin boy.(对划线部分提问,划线部分为：a tall ,thin)