2. If you don't stop talking, you won't understand the lesson.
3. If i knew her number, i would ring her up.
4. If i knew the answer, i could tell you.
5. If we had had a map, we wouldn't have got lost.
6, If Susan hadn't eatn four cream cakes, she wouldn't have felt sick.
Nếu cần làm hết bạn nói mình ạ :>