1. 在美国英语的否定句中,in+时间段是表示在这段时间之内,。如:
She hasn't seen her daughter in three months. 她三个月没有见到她的女儿了。
2. 在将来时的句子中(肯定句),in+时间段通常表示这段时间之后。如:
I'll come in three weeks.我三个星期后回来。
3.在肯定句中,in+时间段有时表示在这段时间之内,主要应该根据语义来判断。如:
I can run 200 metres in about 30 seconds. (摘自《牛津英语用法指南》第四版 386.6 节)我跑200米大约需要30秒。(或:我能够在30秒内跑200米。)
after a particular length of time 在(某段时间)之后
(1)介词in+时间段; 在(某段时间)之后(英文解释:after a particular length of time)
I'll have some breakfast ready in a few minutes.几分钟后我就能做点儿早饭出来。
They'll be back in six months. 6个月之后他们就会回来。
She will return in a few minutes/hours/days/months.
她将在几分钟 / 几小时 / 几天 / 几个月后回来
It will be ready in a week's time (= one week from now) .只需一周的时间就会准备好。
(2)in+时间段 a particular period of time 在(某段时间)内
I haven't seen him in years.我有好些年没见过他了。
It's the first letter I've had in ten days.这是我十天来收到的第一封信。
备注:在表示在某个时间段之内,通常使用“within+时间段”
About 40% of all students entering as freshmen graduate within 4 years...
所有入学新生中约有40%在4年内毕业。
Within 24 hours the deal was completed. 交易在24小时内完成。
You should receive a reply within seven days.你会在七天之内收到答复。
The ambulance arrived within minutes of the call being made.
打电话后几分钟内救护车就到了。
Two elections were held within the space of a year.
在一年的时间之内举行了两次选举。
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