English verb conjugation MUST BEGIN

Irregular verb: begin - began - begun

Affirmation

Simple form

I must begin
you must begin
he must begin
we must begin
you must begin
they must begin

V-ing form

I must be beginning
you must be beginning
he must be beginning
we must be beginning
you must be beginning
they must be beginning

Perfect

I must have begun
you must have begun
he must have begun
we must have begun
you must have begun
they must have begun

V-ing perfect

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

Negation

Simple form

I must not begin
you must not begin
he must not begin
we must not begin
you must not begin
they must not begin

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I begin?
must you begin?
must he begin?
must we begin?
must you begin?
must they begin?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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