which

1. QUEST You use which in questions when there are two or more possible answers or alternatives. 哪一個(gè) (用于疑問句，表示選擇)

"You go down that passageway over there."—"Which one?"

“你順著那邊的過道走?！薄澳膫€(gè)過道？”

Which vitamin supplements are good for you?

哪種維生素補(bǔ)品對你有好處？

2. DET You use which to refer to a choice between two or more possible answers or alternatives. 哪個(gè) (指所做出的那個(gè)選擇)

I wanted to know which school it was you went to. 我想知道你就讀的是哪所學(xué)校。

I can't remember which teachers I had. 我不記得哪些老師教過我。

3. CONJ Which is also a conjunction. 哪個(gè)

In her panic she couldn't remember which was Mr. Grainger's cabin. 慌亂中，她不記得哪間是格蘭杰先生的船艙。

4. PRON-REL You use which at the beginning of a relative clause when specifying the thing that you are talking about. In such clauses, which has the same meaning as that. 引導(dǎo)關(guān)系從句，具體說明所談?wù)摰氖?，此時(shí)與(that)意思相同

Soldiers opened fire on a car which failed to stop at an army checkpoint. 士兵們向一輛沒在軍事檢查站停下來的汽車開了火。

5. PRON-REL You use which to refer back to an idea or situation expressed in a previous sentence or sentences, especially when you want to give your opinion about it. 這個(gè) (指前面所說過的內(nèi)容，尤其要發(fā)表個(gè)人意見時(shí))

They ran out of drink. Which actually didn't bother me because I wasn't drinking. 他們沒有酒了，這個(gè)其實(shí)對我倒無所謂，因?yàn)槲耶?dāng)時(shí)沒在喝酒。

6. DET Which is also a determiner. 這個(gè)

The chances are you haven't fully decided what you want from your career at the moment, in which case you're definitely not cut out to be a boss yet!

很可能你目前沒有完全確定要從職業(yè)中得到什么，在這種情況下，你肯定還沒有具備做老板的素質(zhì)。

7. PHRASE If you cannot tell the difference between two things, you can say that you do not know which is which. 哪個(gè)是哪個(gè) (指無法區(qū)分兩者的不同)

They all look so alike to me that I'm never sure which is which. 它們在我看來簡直一模一樣，我永遠(yuǎn)分不清哪個(gè)是哪個(gè)。