If I had taken that opportunity, my life would be completely different now. WERE If I _______ that opportunity, my life would be completely different now.

I would appreciate it if you could open the window. WILL I would appreciate it if you ___________ to open the window.

If you stop interrupting me, I’ll be able to finish. WILL If you _____________, I’ll be able to finish.

If you should need any assistance, please ring this number. HAPPEN If you should _______ any assistance, please ring this number.

I’m not rich, so I can’t afford that house. WERE If I ____________ afford that house.

You might fail the test if you don’t revise properly. SHOULD You might fail the test _______ to revise properly.

I’d love to help you, but I have to work late tonight. WERE If I _______ work late tonight, I’d love to help you.

I didn’t go to the meeting because nobody told me about it. BEEN Had _________ about the meeting, I would have gone.

I didn’t go to the party because I wasn’t invited. WERE If I _______ to the party, I’d have gone.

If you hadn’t delayed us, we’d have caught the train. FOR We’d have caught the train had_______ your delay.

It’s possible he’ll come — if he does, tell him to wait for me. HAPPEN If he __________, tell him to wait for me.

If I had studied harder, I’d be at university now. STUDIED Had ___________, I’d be at university now.