Conditionals: Zero and First
If the sun _________ (rise), it __________ (be) a day
If the sun rises, it is a day
If he _______ (call) me tonight, I __________ (help) him
If he calls me tonight, I will help him
If it ________ (rain) tomorrow, she __________ (stay) at home.
If it rains tomorrow, she will stay at home.