一个半小时用英语表达是：one and a half hours；
half：n. 一半; 半; (比赛、音乐会等的)半场，半局; (啤酒等饮料的)半品脱。
hours：n. 小时; 约一小时的时间; (工作、办公等的)固定时间。
相关介绍
It often takes me one and a half hours to finish my homework.
我常常花费一个半小时的时间来完成我的功课。
Laying down: Corkage around one and a half hours to drink the best.
最佳饮用时间：开瓶一个半小时饮用最佳。
The session will last for about one and a half hours, and end about11pm.
每堂讨论课为时一小时半，大概会在11点结束。
There are still one and a half hours to go, we neednt be in such a hurry.
还有一个半小时，我们无需如此慌慌张张。
She arrived one and a half hours late and spun ( me) a yarn about her being ill.
她迟到一个半小时，然后对我撒谎说她病了。
