There is somebody knoking at the door.Go to see________.为什么填who it is?为什么不填whom it is或who is it,请对这几

题目

There is somebody knoking at the door.Go to see________.为什么填who it is?为什么不填whom it is或who is it,请对这几种解释分别进行分析

答案

首先,whom是who的宾格,不能做主语,所以,只能用who it is,另外,后面的句子是祈使句,不是问句,所以不用疑问句形式,who is it 是疑问语序,所以,用who it is !