有兩個(gè)判定方法：
1.看被定語從句所修飾的先行詞（名詞/代詞）能不能直接和從句相連.
如果可以直接和從句其他成分相連,無須補(bǔ)上介詞,則用that/which；
如果需要額外補(bǔ)上介詞才能放在定語從句中,則用where.
如：This is the city (which/that I stayed in last year).
把先行詞the city放入后面的定語從句,為：
I stayed in (the city) last year.
the city直接做介詞in的賓語,所以用which/that.
再如：This is the city (where I stayed last year).
把先行詞the city放入定語從句,需要補(bǔ)上介詞in方可,即為：
I stayed (in the city) last year.
所以使用where或in which.
2.看定語從句是缺少地點(diǎn)狀語還是缺少主語/賓語/表語.
如果缺少地點(diǎn)狀語,用where；
如果只缺少主語/賓語/表語,則用which/that.
如：This is the city (which/that) I visited last year.
從句I visited last year中,及物動(dòng)詞visited后面缺少一個(gè)賓語,所以用which/that；
再如：This is the city (where) I lived last year.
I lived last year中,缺少地點(diǎn)狀語in the city,所以用where或in which
其實(shí)上面兩種方法是一樣的,不知道樓主能不能看明白?
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