1. I had to pay a 500 deposit to the landlord before I could move into the house.
   我得付給房東500英鎊押金才能搬進(jìn)房里去。
2. He had no money, nor did he know anyone he could borrow from, either.
   他沒(méi)有錢，也不知道能夠向誰(shuí)借錢。
3. There were about 500 people there, as near as I could judge.
   那里有500人，依我看有這麼多。
4. So hard did he study that he could easily pass the examination.
   他那么努力，因而能夠輕易地通過(guò)那次考試。
5. The woman said that she could not sleep without her husband's snore after 20 years of marriage.
   那位婦人說(shuō)結(jié)婚20年來(lái)，聽不到她丈夫的呼嚕聲，她就睡不著覺(jué)。
6. Always he sought someone to whom he could talk without caution.
   他一直在找一個(gè)能夠隨便談?wù)劦娜恕?/div>
7. I wish we could see more new programmes on television, not repeats all the time.
   我真希望我們能夠看到更多新的電視節(jié)目，而不是翻來(lái)覆去的那幾個(gè)老節(jié)目。
8. I can't sing now, but I could when I was young.
   現(xiàn)在我不會(huì)唱歌了，但我年輕的時(shí)候會(huì)。

could

v.aux.（助動(dòng)詞）
can的過(guò)去式
Used to indicate ability, possibility, or permission in the past:
用來(lái)表示過(guò)去的能力、可能性或允許：
例句：
I could run faster then. It could be no better at that time. Only men could go to the club in those days.
那時(shí)我能跑得更快。那時(shí)好得不能再好了。在當(dāng)時(shí)，只有男人可以去俱樂(lè)部

Used with hypothetical or conditional force:
用來(lái)表推測(cè)或條件：
例句：
If we could help, we would.
如果我們能幫上忙，我們會(huì)幫的

Used to indicate tentativeness or politeness:
用于表示試探性或禮貌：
例句：
I could be wrong. Could you come over hereô
我也許錯(cuò)了。你能到這邊來(lái)嗎ô