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 must not refer
you must not refer
she must not refer
we must not refer
you must not refer
they must not refer

V-ing form

I must not be referring
you must not be referring
she must not be referring
we must not be referring
you must not be referring
they must not be referring

Perfect

I must not have referred
you must not have referred
she must not have referred
we must not have referred
you must not have referred
they must not have referred

V-ing perfect

I must not have been referring
you must not have been referring
she must not have been referring
we must not have been referring
you must not have been referring
they must not 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

must I not refer?
must you not refer?
must she not refer?
must we not refer?
must you not refer?
must they not refer?

V-ing form

must I not be referring?
must you not be referring?
must she not be referring?
must we not be referring?
must you not be referring?
must they not be referring?

Perfect

must I not have referred?
must you not have referred?
must she not have referred?
must we not have referred?
must you not have referred?
must they not have referred?

V-ing perfect

must I not have been referring?
must you not have been referring?
must she not have been referring?
must we not have been referring?
must you not have been referring?
must they not have been referring?

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