1) He is a good student. -> He studies well.
2) They are careful workers. -> They work carefully.
3) She is a beautiful singer. -> She sings beautifully.
4) I am a slow swimmer. -> I swim slowly.
5) We are fast runner. -> We run fast.
6) He was a careless driver. -> He drove carelessly.
7) I am a hard student. -> I study hard.
8) She was an active participant. -> She participated actively.
9) They are bad painters. -> They paint badly.
10) She is a beautiful dancer. -> She dances beautifully.