If it ______ (rain), the ground ______ (get) wet.
If it rains, the ground gets wet.
If you ______ (mix) blue and yellow, you ______ (get) green.
If you mix blue and yellow, you get green.
If you ______ (not exercise), you ______ (gain) weight.
If you don’t exercise, you gain weight.
If the sun ______ (shine), it ______ (feel) warm outside.
If the sun shines, it feels warm outside.
If a baby ______ (be) hungry, it ______ (cry).
If a baby is hungry, it cries.
If people ______ (not water) plants, they ______ (die).
If people don’t water plants, they die.
If students ______ (study), they ______ (learn).
If students study, they learn.
If you ______ (heat) water to 100°C, it ______ (boil).
If you heat water to 100°C, it boils.
If you ______ (touch) fire, it ______ (burn) you.
If you touch fire, it burns you.
If you ______ (eat) too much sugar, your teeth ______ (hurt).
If you eat too much sugar, your teeth hurt.