关于主语从句what we need is time其它形式

关于主语从句what we need is time其它形式 主语从句What we need is some news.中的what 可不可以改用which? What we need is more time 什么是主语从句,What we need is money ,we不就是主语吗,怎么还变成从句了?复制一堆的滚,我查了两 英语写作当中可以用到哪些主语从句.例如 it is no use doing sth.what we need to d What time is it主语 1.what we need is time 2.what we need are good doctors 这两句话为 What we need are good doctors.为什么谓语是are而不是is,主语是waht啊 what we need is a what we need is the What we want to know is why he was late 这句是什么从句 好像有主语从句 表语从句 改错：What we need are time.