一、后接名词时的区别当用作定语修饰其后的名词时,只用which和what,不能用who。which和what的区别是:前者用于选择范围较小或较明确的场合,后者用于选择范围较大或不明确的场合。如:Which color do you like,black or white?黑色和白色,你喜欢哪种? Which is bigger,the sun or the earth?太阳和地球哪个大? First, the difference between the next noun when used as an attribute to modify the next noun, only use what and what, can not use who. The difference between which and what is: the former is used to select a smaller or more specific occasions, and the latter is used to select a larger or ambiguous situation. Such as: Which color do you like, black or white? Black and white, which kind do you like? Which is bigger, the sun or the earth?