1. If the chickens (cross) the road, they finally ( arrive) home safely.

2. If we ( sing) very loudly, neighbours (be / not) happy.

3. If I (to be) very tired, I always (yawn).

4. If I (go) forward, I (not / to step) back.

5. If he (to stop) breathing, he (start) choking.

6. If he (wear) braces, his trousers (not / fall).

7. If a car (be) out of fuel, it ( stop) beside the road.

8. If a plane (to be) out of fuel, it (fall).

9. If she (not / swim) anymore, she (sink) in deep waters.

10. If they (to breathe), they (live).

Тема: Zero Conditional