1. Why don't you star to run and see if that helps you to lose weight?

=> You should start to run and see if that helps you to lose weight

 (should + V nguyên mẫu)

2. They have chosen John for the school's football team.

=> John has been chosen for the school's football team

(câu bị động thì HTHT: S + have/has + been + P.P)

3. It is very noisy in the city but we enjoy living there.

=> Although it is very noisy in the city, we enjoy living there

 (Although/Though/Even though + S + V)

4. The failure of the team caused us great disappointment.

=> We were disappointed with the failure of the team

 (be disappointed at : thất vọng về)

5. The guide speaks too quickly for me to understand.

=> The guide doesn't speak slowly enough for me to understand

(S + don't/doesn't/didn't + V + adv + enough + (for SB) + to V nguyên mẫu)