Write sentences using the zero conditional. 
 1. not have breakfast / feel hungry  
 2. mix red and blue / get purple 
 3.  read for a long time / get a headache 
 4. multiply 20 by 5 / get 100 
 5. put ice in a drink / make it cold 
 6. add 64 and 36 / get 100 

 1. If you do not have breakfast, you feel hungry.   2. If you mix red and blue, you get purple.  3. If you read for a long time, you get a headache.  4. If you multiply 20 by 5, you get 100.  5. If you put ice in a drink, you make it cold.  6. If you add 64 and 36, you get 100.