4. My nephew used to fly a kite in this field when he was a child.

5. You had better water the trees in the garden every day.

6. She suggested that John should take part in that competition the following week.

7. Were I to know the answers, I could tell her.

8. Unless you leave the room right now, I will call the police. 

 4. my nephew used to fly a kite in the field when he was a child 

5 . you had better water the trees in the garden everyday

6 . she suggested that John should take part in that competition the next week.

7 . were I to know the answers , i could tell her

8. unless you don' t leave the room right now, i  'll call the police

rieeng caau6;

đây là câu trực tiếp gián tiếp  và với suggest có 2 dạng: suggest+Ving và suggest + that +S + should ..

đối với câu gián tiếp thì bn phải thay đổi trạng ngữ , chủ ngữ or động từ