A a/an和one(形容词)
1 计算时间、测量距离或重量等时,a/an或one可以用于单数的前面:
£l=a/one pound一英镑
£ 1,000,000= a/one million pounds 100万英镑
但是,请注意:
The rent is £ 100 a week.
房租为每星期100英镑。
这个句子中week前面的a不能用one代替。(参见第2节F。)
在其他类型的陈述句中a/an和one通常不能互换,因为one+名词通常意为 one only/not more than one(只有一个),而a/an则没有这个意思:
A shotgun is no good.
猎枪不行。(这种武器不合适。)
One shotgun is no good.
一枝猎枪不行。(我需要两枝或三枝。)
2 one的特殊用法
(a) one(形容词/代词)与 another/others对照连用:
One(boy)wanted to read,another/others wanted to watch TV.一个(男孩)想看书,另一个/别的男孩们想看电视。(参见第53节。)
One day he wanted his lunch early, another day he wanted it late.
他一天要早点吃午饭,另一天又要晚点吃午饭。
(b) one可以用在 day/week/month/year/summer/winter等词之前,或者用在日期或月份的名称之前,以特指某事发生的时间:
One night there was a terrible storm.
一天晚上有一场特大的风暴。
One winter the snow fell early.
有一年冬天雪下得早。
On e day a telgram arrived.
有一天来了一封电报。
(c) one day也可用来表示 at some future date(将来有一天):One day youll be sorry you treated him so badly.(这里也可用someday。)
终有一天你会因为待他这么不好而后悔的。
(关于one和you,参见第68节。)
B a/an和one(代词)
one是可以用来代替a/an的相应的代词形式:
-Did you get a ticket?
-Yes,I managed to get one.
-你搞到票了吗?
-是的,我设法搞到了一张。
具有这种用法的one的复数形式是some:
-Did you get tickets?
-Yes,I managed to get some.
-你搞到票了吗?
-是的,我设法搞了几张。
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