If you (be) quieter, the baby (not wake up).
had been / wouldn't have woken up
If I _________ (know) how cold it was going to be in London, I _________ (take) warmer clothes.
had known/ would have taken
We __________ (not meet) if you ________ (not invite) us both to dinner that night.
wouldn't have met/ hadn't invited
If I had taken an umbrella...
You _______ (enjoy) the party if you _________ (go).
would have enjoyed / had gone
If he'd scored the penalty...
...
We wouldn't have crashed if...
They wouldn’t have sat down if....
We wouldn't have missed the film if ....
She would have finished the race if...
I __________ (not open) the attachment if I ________ (know) that it had a virus.
wouldn't have opened / had known