1. She doesn’t like playing badminton. (keen)
=> She is not keen on playing badminton ………………………………………………………………………………
2. Nobody in his class is taller than him.
=> He is the tallest person in his class………………………………………………………………………….
3. John looks after his father in the hospital.
=> He takes care of his father in the hospital................................................................................................................
4. Although Mr. Thomas was tired, he still tried to finish all the tasks.
=> In spite of ..being tired, Mr Thomas still tried to finish all the tasks..........................................................................................................
5. She is so smart that she can solve her exercises quickly. (too)            
=> She is too smart to solve her exercises quickly.........................................................................................................................
6. My grandfather bought this house in 1999. (Passive Voice)
=> This house..was bought in 1999 by my grandfather.......................................................................................................