Education of the republic of uzbekistan state university of world languages english language the first faculty

Must, should and ought to compared.

All the three verbs serve to express obligation. Must, however, sounds more forceful, peremptory.

E.g. You must do it at once (Siz buni darhol bajarishingiz lozim!).

Both should and ought to express obligation, advisability and desirability and are used when must would sound too peremptory.

E.g. You should do /ought to do/ it at once (Siz buni darhol bajarishingiz lozim/kerak.|).

Should and ought toare very much alike in meaning and are often interchangeable. In using ought to, however, we lay more stress on the meaning of moral obligation, whereas should is common in instruction and corrections.

E.g. You ought to help him; he is in trouble.

You should use the definite article in this sentence.

Must, ought to and should serve to express supposition implying strong probability. Must, however, seems to be in more frequent use than the other two verbs.