a fag end
一事無成
A: I'm wondering why I come to a fag end after another.
A: 真不知道我為什么總是一事無成。
B: I think you are not trying your best.
B:我覺得你還不夠努力。
A: Why? You are so rude to me. I used to think that I had a considerate wife.
A: 你對我太不客氣了。我還以為我找了個體貼的老婆呢。