英文關係副詞(Relative adverbs in English)

關係副詞為介係詞加上關係代名詞(which)

關係副詞=介係詞+關係代名詞(which)

使用時機	介係詞+關係代名詞
when 表｢時間｣	when= at/in/on…+which	Do you know the time at which(=when) guests come at?(你知道客人來的時間嗎?)
where表｢地方｣	where= in/from…+which	This is the room in which(=where) Jack lived before.(這是Jack以前住的房間)
why表｢原因｣	why= for +which	Tom explained the reason for which(=why) he did not go to the school.(Tom解釋他沒去學校的原因)
how表｢方法｣	how= in +which	Jack wants to know the way in which a pizza is made.(Jack想知道做披薩的方法) =Jack wants to know how a pizza is made.

注意：關係副詞how只能修飾先行詞the way，而且the way和how不能連用，所以只能省略先行詞the way。

參見(See also)
關係子句(Relative clause)
關係代名詞(Relative Pronoun)
複合關係代名詞(Compound relative pronoun)
關係副詞(Relative adverbs)
　關係副詞-when(Relative adverbs-when)
　關係副詞-where(Relative adverbs-where)
　關係副詞-why(Relative adverbs-why)
　關係副詞-how(Relative adverbs-how)
分裂句(Cleft sentence)