which和inwhich用法的区别为什么这个句子：helostthemanuscriptduringthewar,inwhichcasehehadtorewritethebook.要用inwhich,能用which吗?有什么区别?

Question

which和in which用法的区别
为什么这个句子：
he lost the manuscript during the war,in which case he had to rewrite the book.
要用in which,能用which吗?有什么区别?

Answer 1

二者的词性不同.

　　which是关系代词或关系形容词,作为代词用作主语或宾语,作为形容词用作定语；“介词短语+ which”属于副词性,只能用作状语.如：

This is my house, (which) is small and old.  这是我的房子,它又小又旧.[主语]

He is studying economics, (which subject) is very important. 他正在学习经济学, 该学科是很重要的.[定语]

This is the subject (on which) she spoke. 这就是她谈到的话题. [状语]

本句中的which 是关系形容词,指代 the war’s（战争的）,修饰名词 case. 用作 in 的宾语构成介词短语,等于 in the war’s case（在战争的情况下）,在从句中是条件状语.

参考译文：战争期间他把手稿丢失了,在这种情况下,他只好重写这部书.