3. I am sick and tired of doing homework. 我对做作业感到厌烦.
Sick and tired of something 可以视之为一个片语,并没有 sick (生病) 的意思在里面! 例如贩卖机老是吃钱，你也可以说"I am sick and tired of this vending machine."还有一句话也很有趣：I am so sick and tired of being sick and tired. 就是说"你对于老是感到厌烦已经感到十分厌烦了", 我想这是很多都市人共同的心声吧。
