''i wouldnt go swimming on a day like that if I were you '',brain said to tom
-> Brain advised Tom to go swimming on a day like that if he were Tom.
2. I dont have a car
-> I wish I had a car.
3. we must answer this letter immediately
-> This letter must be answered immediately
4. ''could you guard against my handbag while I go to the toilet ?''
->She asked me if I guarded against her handbag while she went to the toilet.
5. it was such a difficult question that no one could answer it correctly
->The question was so difficult that no one could answer it correctly.
6.The wind was bending the young tree to the ground
->The young tree was being bent to the ground by the wind
7. might we find water on Mars?
->Might water be found on Mars?
8. the science librarian is more helpful than the history librarian
->The history librarian is less helpful than the science librarian.
Chúc em học tốt !