If I (to have) a headache, my mother usually (to give) me some medicine.
If I (to cough), I (to drink) hot milk with honey.
If you (to fly) by a budget airline, you (to have) to pay for your drinks and food.
If we (to be) late for school, our teacher (to get) angry.
If we (to learn) more about history, we (not to be) afraid of the test.
If I (to find) his phone number, I (to call) him tonight.
If I (to wear) this hat, I (to look) like an old man.
If I (to find) her address, I (to send) her an invitation.
If train fares (be) cheaper, more people (use) them.
If Molly (get) that job she's applied for, she will be delighted.
It (be) a disaster if it the explosion had happened in the middle of the day.
If the talks (be broken) down again, there (be) a war between the two countries
If Nick (know) anything about mechanics at that time, I'm sure she (help) us.
He (have) a bad accident last Friday if he (not / drive) more carefully.