English verb conjugation MUST SECERN

Regular verb: secern - secerned - secerned

Affirmation

Simple form

I must secern
you must secern
he must secern
we must secern
you must secern
they must secern

V-ing form

I must be secerning
you must be secerning
he must be secerning
we must be secerning
you must be secerning
they must be secerning

Perfect

I must have secerned
you must have secerned
he must have secerned
we must have secerned
you must have secerned
they must have secerned

V-ing perfect

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

Negation

Simple form

I mustn't secern
you mustn't secern
he mustn't secern
we mustn't secern
you mustn't secern
they mustn't secern

V-ing form

I mustn't be secerning
you mustn't be secerning
he mustn't be secerning
we mustn't be secerning
you mustn't be secerning
they mustn't be secerning

Perfect

I mustn't have secerned
you mustn't have secerned
he mustn't have secerned
we mustn't have secerned
you mustn't have secerned
they mustn't have secerned

V-ing perfect

I mustn't have been secerning
you mustn't have been secerning
he mustn't have been secerning
we mustn't have been secerning
you mustn't have been secerning
they mustn't have been secerning

Interrogative form

Simple form

must I secern?
must you secern?
must he secern?
must we secern?
must you secern?
must they secern?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

mustn't I secern?
mustn't you secern?
mustn't he secern?
mustn't we secern?
mustn't you secern?
mustn't they secern?

V-ing form

mustn't I be secerning?
mustn't you be secerning?
mustn't he be secerning?
mustn't we be secerning?
mustn't you be secerning?
mustn't they be secerning?

Perfect

mustn't I have secerned?
mustn't you have secerned?
mustn't he have secerned?
mustn't we have secerned?
mustn't you have secerned?
mustn't they have secerned?

V-ing perfect

mustn't I have been secerning?
mustn't you have been secerning?
mustn't he have been secerning?
mustn't we have been secerning?
mustn't you have been secerning?
mustn't they have been secerning?

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