I'm overtired.

我太累了。

I was so tired I could hardly stagger to my feet.

我太累了,摇摇晃晃的都站不稳了。

I'm dead tired, let's have a rest.

我太累了，我们休息会儿吧。

I am so exhausted that I just want to have a sound sleep.

太累了, 我现在只想美美地睡上一觉。

I am done up,and the work was too much for me.

我太累了,我的工作太多了。

I'm so tired I can't focus today.

今天我太累了，精神集中不起来。

After shopping all day I was tuckered out.

买了一整天的东西，我很累。

I am too fatigued to eat.

我太累了,不想吃东西。

Recently, I feel tired no matter what I do.

最近我无论做什么都会累。

After working for fifteen hours I began to tire.

工作了十五个小时之后，我开始感到累了。