The truth is (that I have been there)為什麽是表語從句

如I

like

reading

books

which

are

written

by

BingXin.

which

從句修飾賓語books，就是賓語從句。

或者在舉壹個be動詞的例子，妳會更明白。

He

is

a

good

student

who

usually

finishes

homework

on

time.

不知道妳明白沒有，賓語從句壹定要有賓語才行。