the fire lasted for 20 days,(during that time)the whole forest was destroyed.为什么不能填during which time
问题描述：
the fire lasted for 20 days,(during that time)the whole forest was destroyed.
为什么不能填during which time
答
背下来把，语言没这么多为什么，用多了就熟悉了。
答
这场大火延续了20天,(在这20天里)整个森林都被烧毁 了
答
这个不是定语从句啊……你看出来没？从结构结构上看，如果是定语从句的话that后面应该是没有那个time的阿……during that time就是在那段时间的意思啊……
答
大火持续烧了20天,(这20天里)整个森林被烧毁
答
如果用which,那应该是during which,即the fire lasted for 20 days,during which the whole forest was destroyed.这句是非谓语从句,which 就整个指代了for 20 days.如用during which time,那么这个which即与time重复,或许你可以这么理解.
答
我觉得是固定用法，没有见过用which的
答
如果 用 which的话 那应该是 the fire lasted for 20days, in which the whole forest was destroyed.