which的用法如下：
1、哪一個；哪一些
used in questions to ask sb to be exact about one or more people or things from a limited number
Which is better exercise─swimming or tennis?
游泳和網球，哪種運動比較好？
Which of the applicants has got the job?
哪一位應聘者得到了這份工作？
Which of the patients have recovered?
哪些患者已經康復了？
Which way is the wind blowing?
風朝哪個方向刮？
2、（明確所指的事物）…的那個，…的那些
used to be exact about the thing or things that you mean
Houses which overlook the lake cost more.
俯瞰湖泊的房子要價高些。
It was a crisis for which she was totally unprepared.
這是一場她完全沒有防備的危機。
3、（進一步提供有關某事物的資訊）那個，那些
used to give more information about sth
His best movie, which won several awards, was about the life of Gandhi.
他最優秀的電影，就是榮獲幾項大獎的那一部，是關於甘地生平的。
Your claim ought to succeed, in which case the damages will be substantial.
你的索賠應當能成功，假如這樣的話，損害賠償金將會相當可觀。
which的用法如下：
1、哪一個；哪一些
used in questions to ask sb to be exact about one or more people or things from a limited number
Which is better exercise─swimming or tennis?
游泳和網球，哪種運動比較好？
Which of the applicants has got the job?
哪一位應聘者得到了這份工作？
Which of the patients have recovered?
哪些患者已經康復了？
Which way is the wind blowing?
風朝哪個方向刮？
2、（明確所指的事物）…的那個，…的那些
used to be exact about the thing or things that you mean
Houses which overlook the lake cost more.
俯瞰湖泊的房子要價高些。
It was a crisis for which she was totally unprepared.
這是一場她完全沒有防備的危機。
3、（進一步提供有關某事物的資訊）那個，那些
used to give more information about sth
His best movie, which won several awards, was about the life of Gandhi.
他最優秀的電影，就是榮獲幾項大獎的那一部，是關於甘地生平的。
Your claim ought to succeed, in which case the damages will be substantial.
你的索賠應當能成功，假如這樣的話，損害賠償金將會相當可觀。