nearby were two canoes in which they had come to the island为什么句子当中要加in

题目

nearby were two canoes in which they had come to the island为什么句子当中要加in

答案

关系代词在从句中,要做从句的主语 或宾语 或表语 或介词的宾语,就是一定要在从句中做名词可充当的成分
which they had come to the island中which在从句中既不是从句中的主语、宾语,又不是从句的表语,那么一定就要有介词放在which前面.
在which前用什么介词,就可以看"介词+which"在从句中是什么意思酌情选择.
（in ）which they had come to the island中which是指 canoes 的,用in表示采用（某种方式）或（表示位置）在…里面,
这句就可翻译成：他们坐船来到这个岛的.
有时in which=where .