first conditional

 If I see him I (give) him a lift.

The table will collapse if you (stand) on it.

If you heat water to 100 C, it ...

If it's true, we ... fired.

I ... you any alcohol, unless you ... over 18.

If I have to do this, I ...

. What will happen if my parachute (not open)? 

If world is a stage, then life ... a game.

If he (be) late we'll go without him.