[If / When ... Simple Present ..., ... Simple Present ...]
[... Simple Present ... if / when ... Simple Present ...]
The Present Real Conditional is used to talk about what you normally do in real-life situations.
If I go to a friend's house for dinner, I usually take a bottle of wine or some flowers.
When I have a day off from work, I often go to the beach.
If the weather is nice, she walks to work.
Jerry helps me with my homework when he has time.
I read if there is nothing on TV.
A: What do you do when it rains?
B: I stay at home.
A: Where do you stay if you go to Sydney?
B: I stay with my friends near the harbor.
IMPORTANT If / When
Both "if" and "when" are used in the Present Real Conditional. Using "if" suggests that something happens less frequently. Using "when" suggests that something happens regularly.
When I have a day off from work, I usually go to the beach.
I regularly have days off from work.
If I have a day off from work, I usually go to the beach.
I rarely have days off from work.
Present Unreal Conditional
[If ... Simple Past ..., ... would + verb ...]
[... would + verb ... if ... Simple Past ...]
The Present Unreal Conditional is used to talk about what you would generally do in imaginary situations.
If I owned a car, I would drive to work. But I don't own a car.
She would travel around the world if she had more money. But she doesn't have much money.
I would read more if I didn't watch so much TV.
Mary would move to Japan if she spoke Japanese.
If they worked harder, they would earn more money.
A: What would you do if you won the lottery?
B: I would buy a house.
A: Where would you live if you moved to the U.S.?
B: I would live in Seattle.