1. She doesn’t live in London because she doesn’t know anyone there
She’d live in London if she knew someone there.
2. I can’t live in the country because I can’t find a job there
I’d live in the country if i could find a job there
3. I don’t have a spare ticket. I can’t take you to the concert
If I had a spare ticket, I would take you to the concert.
4. The schoolchildren sowed some seeds, but they forgot to water them so they didn’t grow.
If the children had remembered to water some seeds, they would have grown.
5. They don’t understand the problem. They won’t find a solution
If they understood the problem, they would find a solution.
6. He sits around too much. He isn’t fit.
If he didn't sit around too much, he would be fit.
7. Carol didn’t answer the phone because she was studying.
If Carol had been free, she would have answered the phone.