一个半小时用英语怎么表达

　　I kept swimming for about one and a half hours.

　　我一直游了一个半小时。

　　I spent only one and a half hours.

　　我这么做只花了一个半小时。

　　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。

　　It took two hours to put out the fire.

　　用了两小时才把火扑灭。

　　My life is further complicated by having to work such long hours.

　　我得工作这么长的时间，因此生活中的麻烦事就更多了。