If it doesn't rain,
If he doesn't read the map,
If the computer doesn't work,
I won't sleep
If it isn't sunny tomorrow,
If the telephone rings,
If I have a headache,
If you send the letter today,
it will arrive tomorrow.
I will call a technician.
the picnic will be cancelled.
we will go to the beach.
if I drink coffee.
he will get lost.
I will take an aspirin.
do not answer it.
