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關閉窗口 (3) 關于 for：是并列連詞(其余三者為從屬連詞)，它有時可表示因果關系(通常要放在主句之后，且可與 because 換用)；有時不表示因果關系，而是對前面分句內容的解釋或推斷(也要放在主句之后，但不能與because 換用)。比較：
The ground is wet, for (=because) it rained last night. 地面是濕的，因為昨晚下過雨。
It must have rained last night, for the ground is wet this morning. 昨晚一定下過雨，你看今天早上地面是濕的。 (此句不能用 because 代 for)
3. although & though
兩者均表示“雖然”，區別如下：
(1) 用作連詞，表示“雖然”，兩者大致同義，可換用，只是 although 比 though 更為正式：
Though [Although] it was raining，we went there. 雖然下著雨，但我們還是去了那兒。
(2) although 一般不用作副詞，而 though 可用作副詞，且一般放在句末(不放在句首)，意為“可是”、“不過”：
It’s hard work; I enjoy it though. 工作很辛苦，可是我樂意干。
(3) 在 as though(好像，仿佛)，even though(即使，縱然)等固定短語中不能用 although：
He talks as though he knew anything. 他夸夸其談好像無所不知。
(4) though 引導的讓步狀語從句可用部分倒裝的形式(注意：倒裝后位于句首的名詞之前不用冠詞)，但 although 一般不這樣用：
Poor though I am, I can afford it. 我雖窮，但這東西還是買得起的。
Child though he was, he did quite well. 他雖是孩子，但干得很好。
六、重點考點原創精練
1. The building must be saved, ______ the cost.
A. what B. which C. whatever D. whichever
2. They kept trying ______ they must have known it was hopeless.
A. if B. because C. when D. where
3. _____ completed, the new railway will run for 250 miles.(when)
A. While B. When C. As D. Since
4. I’ll cook plenty of potatoes just ______ they decide to stay for dinner.
A. because B. when C. in case D. since
5. Get out of there at once. _____ not, I’ll phone the police.(if)
A. Since B. If C. Why D. When
6. _____ I met him last week, it was the first time we had seen each other _____ we were at school.
A. When, that B. When, since C. Since, when D. Since, that
7. _____ they’ve got to know each other a little better, they get along just fine.
A. Now that B. Before C. If D. How
8. We’ve bought a cottage in the country for ____ we retire.
A. when B. if C. since D. that
9. ______ food is hard to find, few birds remain throughout the year.
A. Where B. What C. Whose D. Which
10. _____ she goes, there are crowds of people waiting to see her.
A. Wherever B. However C. Whichever D. Whoever
11. We should report any incident, _____.(m.52ysedu.com)
A. however serious or minor it is B. how serious or minor is it
C. it is how serious or minor D. it is however serious or minor
12. Would you care to wait here, sir, ______ the manager can see you?
A. when B. since C. until D. while
13. Marsha got so carried away when arguing with her husband ______ she hit him.
A. since B. and C. until D. that
14. It could be weeks ______ we know the full cost of the accident.
A. that B. since C. after D. before
15. She is getting better by degrees, but it will be some time ______ she is completely well.
A. that B. since C. when D. before
16. _____ we could afford it, we wouldn’t go abroad for our holidays.
A. Even B. If C. Even if D. Even as
17. She loves giving parties, and does so ______ she can find an excuse.
A. however B. whatever C. whichever D. whenever
參考答案：1—5 CCBCB 6—10 BAAAA 11—15 ACDDD 16—17 CD
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