English verb conjugation MUST BUTTON

Regular verb: button - buttoned - buttoned

Affirmation

Simple form

I must button
you must button
he must button
we must button
you must button
they must button

V-ing form

I must be buttoning
you must be buttoning
he must be buttoning
we must be buttoning
you must be buttoning
they must be buttoning

Perfect

I must have buttoned
you must have buttoned
he must have buttoned
we must have buttoned
you must have buttoned
they must have buttoned

V-ing perfect

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

Negation

Simple form

I must not button
you must not button
he must not button
we must not button
you must not button
they must not button

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I button?
must you button?
must he button?
must we button?
must you button?
must they button?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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