Hey, can you help me because i dont know english • Rewrite the sentences, using must/have to/ should/ ought... 1) I think it's a bad idea to play computer games for hours. You shouldn't play computer games for hours. 2) It's a good idea to set the volume on your MP3 player at a low level. 3) It's forbidden to enter the computer lab. 4) You don't need to pay in cash.