1)I ....... (call) you as soon as I ...... (get) home.
2)If you ....... (not come) inside now,you ...... (miss) the programme.
3)They ......... (not let) you in if you ........ (not be) over 18.

1.  I'll call you as soon as I get home.2.  If you don't come inside now, you'll miss the programme.3.  They won't let you in if you are not over 18.