1. weren't they=> didn't they

2. to eat=> eating 

3. the better=> the best

4. in=>of

5. do=> to do

6. cleverly=> clever

7. listening=> watching

8. couldn't=> didn't

9. câu này ch bt sorry ạ

10. don't=> didn't

1. weren't they `->` didn't they (Tag question: ở trước dùng động từ thường, dạng KĐ và QKĐ nên t.q là didn't + pronoun)

2. to eat `->` eating (feel like doing s.th: cảm thấy muốn làm gì)

3. the better `->` the best (good - better - the best; không có S2 để ss và có mạo từ the `->` ss nhất)

4. would have `->` had (If2: If + S + V_ed/2, S + would/could/ should + V(inf)

5. what do with it `->` what to do with it

6. cleverly `->` clever (tobe + adj: miểu tả)

7. forecast weather `->` weather forecast (: bảng tin thời tiết)

8. Because of `->` Because (Because + Clause = Because of + N/V_ing)

9. has `->` have (I with our classroom là CN số nhiều)

10. don't `->` didn't (last Sunday: QKĐ)