-You should eat more vegetables/ You shouldn’t eat too much meat. (Bạn nên ăn nhiều rau hơn/ Bạn không nên ăn quá nhiều thịt).
-You ought to eat more vegetables/ You ought not to eat too much meat.
-You should do more exercise./ You shouldn’t drink so much beer. 
-You ought to do more exercise./ You ought not to drink so much beer
-You should do more exercise/ You ought to do more exercise.

- You should brush your teeth twice a day.

- You have to wear a helmet when you ride a motobike.

- You must do your homework.

- You should wash fruits and vegetables with water before cooking them.

- You must eat more vegetables instead of eating meat.