Zero vs First Conditional worksheet

1. 1.
   If you mix yellow and blue, you green.a) getb) would get
2. 2.
   If you call me later, I you the details.a) giveb) 'll give
3. 3.
   If people enough sleep, they get ill more often.a) won't getb) don't get
4. 4.
   If we now, we'll be there by 8.a) leaveb) will leave
5. 5.
   If you heat metal, it .a) expandsb) would expand

1. 1.
   If you will press this button, the machine starts.
2. 2.
   If it will rain tomorrow, we'll stay in.
3. 3.
   If water reaches 100°C, it would boil.

Write two sentences about your own life: one with Zero conditional and one with First conditional. Then explain the difference to a partner.

1. 1.a) get Always true: zero conditional.
2. 2.b) 'll give One particular future situation: first conditional.
3. 3.b) don't get A general truth: Present Simple in both parts.
4. 4.a) leave Never will in the if-part.
5. 5.a) expands A scientific fact: zero conditional.

1. 1.If you press this button, the machine starts. Never will in the if-part.
2. 2.If it rains tomorrow, we'll stay in. The if-part takes the Present Simple, even for the future.
3. 3.If water reaches 100°C, it boils. A scientific fact takes the zero conditional.

Answers will vary. Check that each sentence follows the rule on page 1, or paste them into Clarigram to have them checked.