If it ______ (to be) daytime, the sun ______ (to be) visible in the sky.
If it is daytime, the sun is visible in the sky.
If I ______ (to find) his book, I ______ (to return) it.
If I find his book, I will return it.
Ice ________ (to melt) if you _________ (to heat) it.
Ice melts if you heat it.
If Bob ________ (to look) after the barbecue, Sue ________ (to let) the guests in.
If Bob looks after the barbecue, Sue will let the guests in.
Plants _________ (to die) if they _________ (to get / not) enough water.
Plants die if they don't get enough water.
Elaine _________ (to buy) the drinks if somebody _________ (to help) her carry the bottles.
Elaine will buy the drinks if somebody helps her carry the bottles.
If I ______ (to stay) in the sun without protection, I ______ (get) sunburn.
If I stay in the sun without protection, I get sunburn.
If you ________ (to feel / not) well, you ________ (to need) to go to the doctor.
If you don't feel well, you need to go to the doctor.