If he __________________ (eat) everything he ______________________ (be) ill (3)
If he had eaten (eat) everything he would have been (be) ill (3)
The police ______________________ (arrest) him if they ____________________(catch) him (1)
The police will arrest (arrest) him if they catch (catch) him (1)
What ______________________ (happen) if my parachute __________________(not open)? (1)
What will happen (happen) if my parachute does not open (not open)? (1)