English verb conjugation MUST CONCERN

Regular verb: concern - concerned - concerned

Affirmation

Simple form

I must concern
you must concern
he must concern
we must concern
you must concern
they must concern

V-ing form

I must be concerning
you must be concerning
he must be concerning
we must be concerning
you must be concerning
they must be concerning

Perfect

I must have concerned
you must have concerned
he must have concerned
we must have concerned
you must have concerned
they must have concerned

V-ing perfect

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

Negation

Simple form

I must not concern
you must not concern
he must not concern
we must not concern
you must not concern
they must not concern

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I concern?
must you concern?
must he concern?
must we concern?
must you concern?
must they concern?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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