`(1)`. If it didn't rain all day, Jim would join in the game.
`(2)`. If you don’t leave me alone, she will stay at home.
`(3)`. If the weather didn’t snow, they would go to school
`(4)`.If his sister spoke English, She would get the job.
`↓``↓``↓``↓`
`(1)` If + thì hiện tại đơn `;` will + động từ nguyên mẫu
`(2)` If + thì quá khứ đơn `;` would + động từ nguyên mẫu.
`(3)` If + thì quá khứ hoàn thành `;` would + have + V3/V-ed