两个半小时英文怎么说?

"Two and a half hours" 表示两个半小时。这是通过将半小时加到两个小时上得出的。

例句：

The movie is two and a half hours long.
电影长两个半小时。
It will take two and a half hours to get there by car.
开车去那里需要两个半小时。
I need to finish this project in two and a half hours.
我需要在两个半小时内完成这个项目。