1. I´ve tried till I´m tired.
    我一直在试，直到累了才停下来。

2. It is no use offering the manual labourer, tired out with a hard week´s sweat and effort, the chance of playing a game of football or baseball on Saturday afternoon.
    对于流汗出力干了一周苦活的体力劳动者来说，让他们在星期六下午再踢足球或打垒球是不合适的；

3. I feel very tired.
    我感觉累得很。

4. In the third and final stage, people often feel weak, tired, and out of breath — and exercise performance is severely compromised.
    在第三也即最后阶段，人常常感到虚弱，疲乏无力，喘不过气，运动成绩大打折扣。

5. I don't tell her that he's not my baby because I'm tired of explaining.
    我没告诉她他不是我的孩子，因为我懒得解释了。