Respuesta:
* If you don't use the mask, you will get covid.
* If I have time tomorrow, I will help you.
* Alice, if you don't hurry up, you will be late for the meeting.
* If you don't take an aspirin, your headache won't disappear.
* If Paul fell sick, I will go either.
* If he doesn't go, I will go either.
* My sister will go shopping, if she has time in the afternoon.
* My parents will be angry if I smoke.