How _____(sadly) he looks.Do you know what happened to him?

问题描述:

How _____(sadly) he looks.Do you know what happened to him?

How __ sad___(sadly) he looks.Do you know what happened to him?
这里 look是系动词,系动词,亦称联系动词(link verb), 表像系动词用来表示"看起来像"
用形容词 来修饰
故填写 sad

sad

sad,用形容词来修饰动词look