The document discusses the zero conditional, which refers to situations that are always true. It provides examples of zero conditional sentences using the structure of "if" clause followed by a main clause. Specifically, it states that if you heat water to 100 degrees it will boil, if water gets below freezing it will turn to ice, and if you add two and two the result will be four. It then provides exercises to match if clauses with main clauses to form additional zero conditional sentences.

1. ZERO CONDITIONAL

2. If you heat water to 100 degrees,
… it boils.

3. If water gets below freezing,
… it turns into ice.

4. If you don’t water plants,…
… you get purple.
If you add two and two,…
When the traffic light changes to amber,…
When I am stressed, …

5. The Zero conditional
'IF' CLAUSE
(CONDITION)
MAIN CLAUSE
(RESULT)
If + simple
present
If you heat ice
If it rains
simple present
it melts.
you get wet

6. Exercises
Match the clauses from both columns to create zero
conditional sentences.