which
01
どれ
used to ask or talk about one or more members of a group of things or people, when we are not sure about it or about them
例
Which of these options is the best solution to the problem?
これらの選択肢の中で、問題に対する最善の解決策はどれですか？
Which of these dresses do you like the most?
これらのドレスのうち、どれが一番好きですか？
02
どちら, どれ
used to refers to animals and things
例
The car which is parked outside, belongs to John.
外に駐車されている車は、ジョンのものです。
The house which was built in the 19th century is now a museum.
19世紀に建てられた家 は 今では博物館です。
03
どちら, どの
used to represent a clause, idea, or concept that acts as the subject or object of the verb or preposition
例
We need to decide which option to take.
どのオプションを取るかを決める必要があります。
It 's unclear which will be most effective.
どちらが最も効果的かは不明です。
which
01
どの, どちら
used when we want to talk about something specific giving more information about it
02
どの, どちら
used to inquire about specific items or choices within a group
例
Which color do you prefer, red or blue?
どの色が好きですか、赤か青か？
Which book should I read first, the mystery or the romance novel?
どの本を最初に読むべきですか、ミステリー小説それともロマンス小説？
