对不起，我做不到了英语怎么翻译？

sorry ,it's beyond me.beyond 一词老外常用，比i can't do it 要地道的多，外国人喜欢用介词代替动词

I am sorry,I can't make it.

make it: 办成，做到，成功；赶上，及时达到

sorry, I cannot do it

sorry, it's beyond my capability

Sorry i can't go on with it