Matching Pairs Zero conditionalOnline version The zero conditional usage by Sandra Dias 1 If you don't pay attention, 2 If you want to come, 3 Fish die if 4 Does ice melt 5 If you prefer, 6 If you heat water to 100 degrees Celsius, 7 If you heat water, 8 My boss gets angry, 9 If you press the button, 10 If you touch the motorcycle, the machine starts to work. it evaporates. if you heat it? you cut yourself with a knife. if I am late for work. it boils. they stay out of water. I can take a cab. the alarm goes off. call me before 5:00 p.m.