關係副詞的檢查法:
關係副詞有四個:why, when, where, how
a. why:置 the reason 之後(why 亦可省略)
例:
I know the reason | for which why |
Jane is crying. |
=
I know | the reason why |
Jane is crying. |
Should a nuclear war break out, it might be the end of the world.
如果核戰爆發,那恐怕會是世界末日。