he disappeared last month,_________ we have heard nothing of himA when B after which C from which D since when选哪个?但是这里_________ we have heard nothing of him 我认为是非限制性定语从句修饰last month 所以是since which 才
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he disappeared last month,_________ we have heard nothing of himA when B after which C from which D since when选哪个?但是这里_________ we have heard nothing of him 我认为是非限制性定语从句修饰last month 所以是since which 才
he disappeared last month,_________ we have heard nothing of him
A when B after which C from which D since when
选哪个?
但是这里_________ we have heard nothing of him 我认为是非限制性定语从句修饰last month 所以是since which 才对 如果选when就成了since in which（?）
难道这句话不是定语从句?
he disappeared last month,_________ we have heard nothing of himA when B after which C from which D since when选哪个?但是这里_________ we have heard nothing of him 我认为是非限制性定语从句修饰last month 所以是since which 才
He disappeared last month, _________ we have heard nothing of him.
A when B after which C from which D since when
你说的是对的,这确实是个非限制性定于从句.最佳答案选D,但是这是一句很别扭的英语.
1. 非限制性定语从句中,which这个引导词可以指先行词,也可以指前面整个句子所陈述的事情.
“如果选when就成了since in which（?）”并不一定是这样的.我们说,where 常可以用"介词+which"来替换,但是这里的“介词”不一定就是in.如：
He climbed out of the chimney, where he had spent two hours.
=He climbed out of the chimney, (in which) he had spent two hours.（where 在烟囱里）
He fell down the tree, where he could see the star on the stage.
=He fell down from the chimney, (on which ) he could see the star on the stage. (where在烟囱上)
同理,when=介词+which的时候,不一定是in,有可能指的是from which,during which
而且,咱们一般不这样替换过来,而且也不是所有的都能替换,尤其是when.这里的when就指前面的时间last month
2. A答案里面when不引导非限制定于从句.B的after which 这里的which可以理解成“他上个月消失”这件事情.意思上,是正确的,但是后面用的完成时,since常用在完成时.C不对,