We must eat or drink in the classroom.改为否定句怎么改

We must eat or drink in the classroom.改为否定句怎么改 We must not eat or drink in the classroom. (must not eat or drink ang eat in the classroom改为否定句 You must eat in the classroom 改为否定句 We must not eat（ ）drink in the classroom. we must not food or drink in the classroom. Don't eat or drink in the classroom.用should改写句子,意思不变,怎么改? 1.We mustn't eat or drink in the classroom.(保持原句的意思） Don't eat or drink in the theatre.(改否定句,不改变句子意思） Don't eat or drink in the theatre.(改否定句,不改变句子意思) Drink and eat in the ciassroom改为否定句 You can't eat or drink in the classroom.(改为祈使句） ------------