which可以引导定语从句,宾语从句,主语从句.例如:1、I bought a room yesterday,which used to belong to Tom.(定语从句)2、I don't know which one I should buy.(宾语从句)3、Which bus we should take is still a question.(主语从句)4、
which不能引导同位语从句,只能that引导,which should be chosen is still a problem,应该选择哪一个,一直是个问题,困扰着我 .你看这样改可不可以 there is a problem that i certainly don't know which one i should choose.
which可以引导定语从句、修饰表示事物的先行词.在定语从句中充当主语、宾语或者表语.例如:He was reading a book, which was about war. 他正在读一本关于战争的书.关系代词which在修饰book的定语从句中充当主语. He was reading a
可以啊, 如,the problem is which he should choose (from)which he should choose (from) is the problem其实是把which 前的that省略了,因为不能有连个引导词.
两者有冲突的主要是在引导定语从句时进行选择.只能用that的情况:1 先行词是不定代词;2 先行词被不定代词修饰;3 先行词被形容词最高级修饰;4 先行词被序数词修饰;5 先行词被 the only,the very, the next,the last修饰;6 先行词中有人又有物.在引导名词性从句时,that既不做句子成分也没有词义;which可以作句子成分,有词义.that 可以用来引导原因状语从句,但which不可以.供参考.
which只能引导定语从句 what能引导主语从句 宾语从句 表语从句 名词性从句都可以
尽管which通常都引导关系从句,也就是定语从句,但引导名词性从句也是可以的.举个很简单的例子:I'll ask him which one he likes.就是which引导的名词性从句,作ask的双宾语.