male gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation MUST LOOK
Regular verb: look - looked - looked
Affirmation
Simple form
I must lookyou must look
she must look
we must look
you must look
they must look
V-ing form
I must be lookingyou must be looking
she must be looking
we must be looking
you must be looking
they must be looking
Perfect
I must have lookedyou must have looked
she must have looked
we must have looked
you must have looked
they must have looked
V-ing perfect
I must have been lookingyou must have been looking
she must have been looking
we must have been looking
you must have been looking
they must have been looking
Negation
Simple form
I mustn't lookyou mustn't look
she mustn't look
we mustn't look
you mustn't look
they mustn't look
V-ing form
I mustn't be lookingyou mustn't be looking
she mustn't be looking
we mustn't be looking
you mustn't be looking
they mustn't be looking
Perfect
I mustn't have lookedyou mustn't have looked
she mustn't have looked
we mustn't have looked
you mustn't have looked
they mustn't have looked
V-ing perfect
I mustn't have been lookingyou mustn't have been looking
she mustn't have been looking
we mustn't have been looking
you mustn't have been looking
they mustn't have been looking
Interrogative form
Simple form
must I look?must you look?
must she look?
must we look?
must you look?
must they look?
V-ing form
must I be looking?must you be looking?
must she be looking?
must we be looking?
must you be looking?
must they be looking?
Perfect
must I have looked?must you have looked?
must she have looked?
must we have looked?
must you have looked?
must they have looked?
V-ing perfect
must I have been looking?must you have been looking?
must she have been looking?
must we have been looking?
must you have been looking?
must they have been looking?
Interro-negative form
Simple form
mustn't I look?mustn't you look?
mustn't she look?
mustn't we look?
mustn't you look?
mustn't they look?
V-ing form
mustn't I be looking?mustn't you be looking?
mustn't she be looking?
mustn't we be looking?
mustn't you be looking?
mustn't they be looking?
Perfect
mustn't I have looked?mustn't you have looked?
mustn't she have looked?
mustn't we have looked?
mustn't you have looked?
mustn't they have looked?
V-ing perfect
mustn't I have been looking?mustn't you have been looking?
mustn't she have been looking?
mustn't we have been looking?
mustn't you have been looking?
mustn't they have been looking?