for引导一段时间,强调时间由始至终,可译为“(时间)长达……”,一般与有长度的时间短语连用,如for three weeks, for a long time 等,可用于现在(过去)完成时或过去时的句子里。
造句:
1.He studied English for three years.
他学了三年英语。
2.The French teacher has been in China for about a month.
这位法国老师在中国已经大约一个月了。
3.I'll be away for some time.我要离开一段时间。
4.He once worked in Janpan for 3 years.他曾经在日本工作3年。
5.I have been lived here for two years.我住在这已经两年了。