1. If I hear a thief I (shall catch) him.
2. He would go to the cinema if he (had) more time.
3. I (would have phoned) her yesterday if I had known her number.
4. If they were rich they (would stay) at a hotel.
5. I would have been glad if he (had visited) me in hospital.
6. I would pass the exam if I (learnt) harder.
7. If she explains him the situation he (will understand) it.
8. If we had gone to London we (would have seen) the Tower.
9. I will have to invite Bob if I (invite) Linda.