1. Nam was absent from class because of his illness.1. Nam was absent from class because of his illness.

Bạn dùng because of nha

Công thức: Because of + noun/ pronoun/ noun phrase

2. They had to stay home because it rained cats and dogs.2. They had to stay home because it rained cats and dogs.

Bạn dùng because nha

Dịch: Họ phải ở nhà vì trời mưa to

Công thức: ...because S + V + O 

rained cats and dogs = rain heavily

3. Na is sick, so she won't go to school today.3. Na is sick, so she won't go to school today.

Do ở câu gốc là "Because of her sickness today" nên bạn sử dụng thì hiện tại đơn và tương lai đơn nha

Công thức thì hiện tại đơn: S + v(s/es)

Công thức thì tương lai đơn: S + will + v-inf

4.4. It was so hot that that I have to turn on the air conditioner.

Công thức: ...that+S+V+O

5. It is a three-day trip.5. It is a three-day trip.

Công thức:  S + tobe + a/an + N ( miêu tả cái gì đó như nào )

Do có "-" nên là day không cần thêm "s" nha

6. This dress is the same as this one.6. This dress is the same as this one.

Công thức: The same as + N/The same +noun+as…/The same + N.

7. She is so lazy that she can't pass the test.7. She is so lazy that she can't pass the test.

Bạn dùng so nha

8. She is not tall enough, so she can't play volleyball.8. She is not tall enough, so she can't play volleyball.

Do ở câu gốc là "Cô ấy không cao đủ để chơi bóng chuyền" nên câu này bạn chuyển thành thế này nha

9. It took her two hours to wash the clothes.9. It took her two hours to wash the clothes.

10. It only takes three hours to fly from HCM city to Singapore.