就是what与which的区别.
还有一个是what有纯名词性的,如:Whathesaidiswrong.
which只能是由一个疑问句变来的名词性从句.
作为疑问代词what和which的区别是:
后者给定选择的范围.前者不限.
如:
Whichdoyoulikeeat,Aor回答在A或B中选一个.
Whatdoyouliketoeat?回答是开放性的.
两个词都可以作定语,后加名词如:
Whichbookdoyouwanttobuy?
Whatbookdoyouwanttobuy?
问:什么叫纯名词性
不带疑问性质的=名词+that-定语从句的.
这是我发现的关于名词性从句的一个细节.
这种名词性从句作主语时,是不可以用it来代替而后置的.
比如:ThebooksthatIboughtyesterdayareveryinteresting.不能说成:ItisveryinterestingthebooksthatIboughtyesterday吧?同理,WhatIboughtyesterdayisveryexpensive.不说:ItisveryexpensivewhatIboughtyesterday.
但是:Whatweshoulddonextisstillunclear.-->Itisstillunclearwhatweshoulddonext.常这么说.