英语语法问题she was struck by a very heavy storm during which her

这句话确实有问题.
这句话的意思是：在她汽车抛锚的时候她陷入一场暴雨中.
during是个介词,表示在...时间内,后面接了一个宾语从句,也就是在她汽车抛锚这段时间里.但是如果是这样引导宾语从句的话,不应该用which引导,which引导宾语从句的意思是哪一个,根本与句意不符合,应该用that.
或者说去掉during.改成she was struck by a very heavy storm when her rudder was torn away.when引导时间状语从句.

否则which在定语从句中没有成分可做
during which=during the storm，就没有这个问题了