A: Sorry, I overslept. My alarm clock didn't go off this morning.

B: Again?

A: That's right, even though I did set the alarm last night.

B: Your clock never works. Perhaps you should buy a new one.

A: Well. If it breaks down again tomorrow, I'll definitely buy a new one.

B: Maybe by then it will be too late.

A: What do you mean "too late"?

B: By that time, you will be fired.