1. Fight tooth and nail

牙齿和指甲都派上用场，说明也是够拼了，这个短语的意思正是“全力拼搏”。

例：He fought tooth and nail to keep his job.

他竭尽全力保住自己的工作。

2. For all sb is worth

最大限度地发挥某人的价值，言外之意就是有多大劲使多大劲啊~

例：I ran for all I was worth.

我拼命地跑。

3. Work fingers to the bone

干活干得手指头都细了，也能看出你很卖力气。

例：I spent the day working my fingers to the bone, and now I want to relax.

我已经卖力干活一整天了，现在就想歇歇。

4. Bust¹ a gut²

Bust有“爆裂”的意思，gut可指“内脏”，看到这样的组合真是感觉要拼出内伤了，它的意思是“拼命干”。

例：We're going to have to bust a gut to finish this project on time.

为了按时完工，我们必须得拼命干。

5. Strain oneself

Strain可以表示“绷得很紧”，这个词组指让人费了九牛二虎之力，过度操劳。

例：Don't strain yourself trying to think of the answer. I can tell you what it is.

别费劲想答案了，我能告诉你。