English verb conjugation MUST FUNCTION

Regular verb: function - functioned - functioned

Affirmation

Simple form

I must function
you must function
he must function
we must function
you must function
they must function

V-ing form

I must be functioning
you must be functioning
he must be functioning
we must be functioning
you must be functioning
they must be functioning

Perfect

I must have functioned
you must have functioned
he must have functioned
we must have functioned
you must have functioned
they must have functioned

V-ing perfect

I must have been functioning
you must have been functioning
he must have been functioning
we must have been functioning
you must have been functioning
they must have been functioning

Negation

Simple form

I must not function
you must not function
he must not function
we must not function
you must not function
they must not function

V-ing form

I must not be functioning
you must not be functioning
he must not be functioning
we must not be functioning
you must not be functioning
they must not be functioning

Perfect

I must not have functioned
you must not have functioned
he must not have functioned
we must not have functioned
you must not have functioned
they must not have functioned

V-ing perfect

I must not have been functioning
you must not have been functioning
he must not have been functioning
we must not have been functioning
you must not have been functioning
they must not have been functioning

Interrogative form

Simple form

must I function?
must you function?
must he function?
must we function?
must you function?
must they function?

V-ing form

must I be functioning?
must you be functioning?
must he be functioning?
must we be functioning?
must you be functioning?
must they be functioning?

Perfect

must I have functioned?
must you have functioned?
must he have functioned?
must we have functioned?
must you have functioned?
must they have functioned?

V-ing perfect

must I have been functioning?
must you have been functioning?
must he have been functioning?
must we have been functioning?
must you have been functioning?
must they have been functioning?

Interro-negative form

Simple form

must I not function?
must you not function?
must he not function?
must we not function?
must you not function?
must they not function?

V-ing form

must I not be functioning?
must you not be functioning?
must he not be functioning?
must we not be functioning?
must you not be functioning?
must they not be functioning?

Perfect

must I not have functioned?
must you not have functioned?
must he not have functioned?
must we not have functioned?
must you not have functioned?
must they not have functioned?

V-ing perfect

must I not have been functioning?
must you not have been functioning?
must he not have been functioning?
must we not have been functioning?
must you not have been functioning?
must they not have been functioning?

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