았을거예요, 았을텐데요.

나에게 그 일 일어나면 어떻게 할지 모르겠어요.
If that happens to me, I don't know what I'm gonna do.

나에게 그 일 일어났으면 어떻게 하는지 모랐을거예요.
If that had happened to me, I don't know what I would have done.

감자를 보면 사겠어요.
If I see potatoes, I'm gonna buy them.

감자를 보았으면 샀을거예요.
If I had seen potatoes, I would have bought them.

감자를 보았으면 샀을텐데요.
If I had seen potatoes, I probably would have bought them.

지금은 열심히 공부하면 나중엔 공부해야 하지 않겠어요.
If I study hard now, I won't have to study later.

그땐 열심히 공부했으면 이젠 공부해야 하지 않아요.
If I had studied hard then, I wouldn't have to study now.

이번에는 도와줄텐데 다음에는 혼자서 해야되죠.
I'll help you this time, but next time you really need to do it on your own.

내일 비가 올텐데 집안에 있을테니까 옷에 대한 걱정하지 마세요.
It's gonna rain tomorrow, but we're gonna stay inside so don't worry about your clothes.

나를 묵살해요. 내가 화난 거 알고 있네요.
He's ignoring me. He must know I'm angry.

나를 묵살했어요. 내가 화난 거 알았을거예요.
He ignored me. He must have known I was angry.

정답했으니까 책을 읽었을거예요.
Since he answered correctly, he must have read the book.