I can't do this sum.

我不会做这道算术题。

《牛津词典》

If you are thinking 'I can't do this.

如果你老是想着我做不到啊。

youdao

Thursday, January 14, 1:24 p.m. : "God, I can't do this anymore"?

1月14日周四下午1点24分“上帝啊，我再也做不了这个啦”？

youdao

"I don't think at this point there is evidence that that can be done in a consistent way because people do tend to regain weight."

VOA: standard.2010.07.16

I can't, I can't do this. I'm so excited that I can't eat lunch.

我实在太兴奋了，以至于我都没法吃午餐了。

so that 课堂 - SpeakingMax英语口语达人

I'm sorry. I can't do this anymore.

我很抱歉，我没法继续下去了。

I can't 课堂 - SpeakingMax英语口语达人

But if we're going to win the race, here's the thing: I can't do this alone.

WHITEHOUSE: President Obama Holds a Town Hall in New Hampshire

"When I take a groups of women out into the cold environment, they are a lot more unsure, their default position is 'I can't do this, '" she said.

CNN: STORY HIGHLIGHTS

"I thought, 'I can't do this, '" Amato says.

NPR: Businesses Blame Slow Sales on Housing