Làm r giải thích giúp mình với mình cần gấp lắm ạ

1. If my sister weren't very busy doing homework, she could help my mom with the laundry.

2. If you didn't help, I wouldn't finish building this robot.

3. If our cousins didn't live quite far away, we would visit them often.

4. If Susan didn't have a headache, we would go on a picnic with us.

5. If you don't hurry, you will miss the bus to the mall.

4 câu đầu dùng type 2 để thể hiện ý trái với hiện tại

câu 5 dùng type 1 vì hành động "miss the bus" có thể xảy ra nếu không "hurry"