English verb conjugation MUST REFER

Regular verb: refer - referred - referred

Affirmation

Simple form

I must refer
you must refer
she must refer
we must refer
you must refer
they must refer

V-ing form

I must be referring
you must be referring
she must be referring
we must be referring
you must be referring
they must be referring

Perfect

I must have referred
you must have referred
she must have referred
we must have referred
you must have referred
they must have referred

V-ing perfect

I must have been referring
you must have been referring
she must have been referring
we must have been referring
you must have been referring
they must have been referring

Negation

Simple form

I mustn't refer
you mustn't refer
she mustn't refer
we mustn't refer
you mustn't refer
they mustn't refer

V-ing form

I mustn't be referring
you mustn't be referring
she mustn't be referring
we mustn't be referring
you mustn't be referring
they mustn't be referring

Perfect

I mustn't have referred
you mustn't have referred
she mustn't have referred
we mustn't have referred
you mustn't have referred
they mustn't have referred

V-ing perfect

I mustn't have been referring
you mustn't have been referring
she mustn't have been referring
we mustn't have been referring
you mustn't have been referring
they mustn't have been referring

Interrogative form

Simple form

must I refer?
must you refer?
must she refer?
must we refer?
must you refer?
must they refer?

V-ing form

must I be referring?
must you be referring?
must she be referring?
must we be referring?
must you be referring?
must they be referring?

Perfect

must I have referred?
must you have referred?
must she have referred?
must we have referred?
must you have referred?
must they have referred?

V-ing perfect

must I have been referring?
must you have been referring?
must she have been referring?
must we have been referring?
must you have been referring?
must they have been referring?

Interro-negative form

Simple form

mustn't I refer?
mustn't you refer?
mustn't she refer?
mustn't we refer?
mustn't you refer?
mustn't they refer?

V-ing form

mustn't I be referring?
mustn't you be referring?
mustn't she be referring?
mustn't we be referring?
mustn't you be referring?
mustn't they be referring?

Perfect

mustn't I have referred?
mustn't you have referred?
mustn't she have referred?
mustn't we have referred?
mustn't you have referred?
mustn't they have referred?

V-ing perfect

mustn't I have been referring?
mustn't you have been referring?
mustn't she have been referring?
mustn't we have been referring?
mustn't you have been referring?
mustn't they have been referring?

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