五点四十分有两种表达方式：

六点差20分：twenty to six;

五点过40分 five forty;

英语时间的表达方式一是直接读:

如:

6:10six ten；

二是逆读，4:50 ten to five；

三是恰好半小时的，如6:30 half past six；

四是过15分钟的，如9:15 a quarter to nine。

相关介绍

At twenty to six I was waiting by the entrance to the station

5点40分我正在车站入口处等着。

We have lived in the same house for twenty years.

我们在同一座房子里住了二十年了。

I was twenty years old and ready for anything.

我当时二十岁，什么都愿意去做。

Twenty guests are enough, I would have thought.

我觉得二十位客人就够了。

There were twenty or so people there.

那儿有差不多二十个人。

Pick a number from one to twenty.

从一至二十中挑选一个数。