1. CONDITIONAL

2.  Is formed if
+ present simple + future simple. It is
used when an actual or potential situation is:
If it rains today, I'll stay at home.
 If clause
 Main clause
 If + Present tense
 will / can / may / must + verb
 If it rains today,
 I'll stay at home

3.  If he is busy now, I will come back tomorrow.
 If she doesn't call you, you can call her
 If you work hard, you may become a
millonaire someday.
 If they don't invite you, you must not go.

4.  This conditional refers to a situation which is
always true (universal truths): If
you freezewater, it turns Into ice.
 If clause Main clause
 If + Present tense Present tense
 If you freeze water it turns into ice.

5.  If you freeze water, it turns into ice.
 If I have time, I usually go to the movies.
 If she doesn't know the answer, she keeps
silent.
 If we don't go out on Saturdays, we rent a
video and stay home.

6.  It refers to a hypothetical situation and the
structure is formed by simple if
+ simple past +conditional
 If clause
 Main clause
 If + Past Simple
 would / could / might + verb
 If I won the lottery,
 I would travel around the world.

7.  If I won the lottery, I would travel around the
world.
 If it were not raining, we could go out.
 If they worked for that company, they might
have better salaries.