| If it rains, | I will | stay home. |
| If you study, | you will | pass. |
| If he calls, | I will | answer. |
| If it rained, | I would | stay home. |
| If you studied, | you would | pass. |
| If he called, | I would | answer. |
"If I were the mayor of my city, I would build more bike lanes," says Juan. "I would plant a thousand trees and I wouldn't allow cars in the centre. If people used public transport, the air would be much cleaner."