In 'zero' conditional sentences, the tense in
both parts of the sentence is the simple present:
If + simple present
If you heat ice
NOTE: The order of the clauses is not fixed - the 'if'
clause can be first or second:
Ice melts if you heat
You get wet if it
In these sentences, the time is now or
always and the situation is real and possible. They are
used to make statements about the real world, and often refer to general
truths, such as scientific facts.
a. If you freeze water, it
b. Plants die if they
get enough water.
c. If my husband
cold, I usually catch it.
d. If public transport is efficient, people
e. If you mix red and blue, you
The structure below is often used to give instructions,
using the imperative in the main clause: