write sentences using the 3rd conditional

If it had not been for the bad weather, we would have gone for a walk.

They would have prevented the accident, if they had made the right decision.

They would have had no end of trouble, if they had made the right decision.

вот) а сколько нужно предложений?

If I had learned the rule, I wouldn't have done the mistake in the test.

If it had rained yesterday, we would have stayed at home.

etc