1. If you had been busy , I'd have left you alone
2.If my friend had came , I"d have been very glad .
3.If mother had bought a cake , we'd have had a very good time together
4.If he had came to our house yesterday , he'd have met his friend
5.If he had worned me , I should have done the work in time
6. If she had returned earlier , she'd have been able to se him before he left .
7.My brother would not have missed so many lessons if he hadn't hurt his leg .