賓語從句就是充當(dāng)賓語的從句.比如：I don't know who he is.這里who he is 是賓語從句,做know的賓語.
要點(diǎn)是：賓語從句要用陳述句句式,不能說成who is he.還有,如果主句是過去時,從句也要相應(yīng)的改變時態(tài).比如.He asked who he was.表語從句呢表語從句就是充當(dāng)表語的從句。表語就是跟在系動詞后面的成分。比如：He became who he wanted to be. who he wanted to be 就是表語從句。