The document discusses different types of conditionals in English grammar. The zero conditional uses a present tense in both the if-clause and main clause to describe general truths. The first conditional uses a present tense in the if-clause and will/can/may/must + verb in the main clause to describe possible future events. The second conditional uses a past tense in the if-clause and would/could/might + verb in the main clause to describe hypothetical or unlikely events.

1. CONDITIONALS

2. ZERO CONDITIONAL
If clause Main clause
If + Present tense Present tense
If you freeze water, it turns into ice.

3. ZERO CONDITIONAL
 If I work too much, I get tired.

4.  If I have time, I usually go to the movies.
ZERO CONDITIONAL

5. IF CLAUSE MAIN CLAUSE
IF + PRESENT TENSE WILL / CAN / MAY / MUST +
VERB
IF IT RAINS TODAY, I'LL STAY AT HOME
FIRST CONDITIONAL

6. FIRST CONDITIONAL

7.  If you work hard, you may become a
millionaire someday.
FIRST CONDITIONAL

8. SECOND CONDITIONAL
If clause Main clause
If + Past Simple would / could / might + verb
If I won the lottery, I would travel around the world.

9.  If we didn't have to work today, we could
have a picnic.
SECOND CONDITIONAL

10.  If they worked for that company, they
might have better salaries.
SECOND CONDITIONAL