If you heat water, it boils.

If ice melts, it turns to
water.

If a cat crosses your
path, it brings good luck.

If you throw a stone into
water, it sinks.

If I'm late for school, my
teacher is angry.

The cat runs away if we
leave the door open.

The machine switches
off if you press this
button.

If you do a lot of
exercise, you get fit.

You get fat if you eat too
much.

If you think too much,
you get depressed.