1. They didn't come to my party, so I didn't meet them
→ If they had come to my party, I would have met them.
2. Trang is busy. She can't help me
→ If Trang weren't busy, she could help me.
3. We stayed at home because the weather was bad
→ If the weather hadn't been bad, we wouldn't have stayed at home.
4. Because the final test is difficult, I can't do it
→ If the final test weren't difficult, I could do it.
5. My mom callled him, so he went home
→ If my mom hadn't called him, he wouldn't have gone home.
6. Hoang didn't come to my party because he was busy
→ If Hoang hadn't been busy, he would have come to my party.
7. My mom got a fever. I cooked by myself
→ If my mom hadn't gotten a fever, I wouldn't have cooked by myself.
8. The baby makes too much noise. She can't pay attention to the lesson
→ If the baby didn't make so much noise, she could pay attention to the lesson.