1.      Jack was late for the meeting because his watch was slow.

If Jack’s watch hadn’t been slow, he wouldn’t have been late to the meeting.

2.      Heinrich regrets not having gone to art school when he was younger.

Heinrich wishes he had gone to art school when he was younger.

3.      We don’t live in a big city, so we can’t easily get access to the Internet.

If we lived in a big city, we could easily get access to the Internet.

4.      ‘If your job is so bad, why don’t you leave?’ she said.

She advised me to leave my job (if it was so bad).

5.      I used my calculator; otherwise I’d have taken longer.

Had I not used my calculator, I would have taken longer