English verb conjugation MUST RETAIN

Regular verb: retain - retained - retained

Affirmation

Simple form

I must retain
you must retain
he must retain
we must retain
you must retain
they must retain

V-ing form

I must be retaining
you must be retaining
he must be retaining
we must be retaining
you must be retaining
they must be retaining

Perfect

I must have retained
you must have retained
he must have retained
we must have retained
you must have retained
they must have retained

V-ing perfect

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

Negation

Simple form

I mustn't retain
you mustn't retain
he mustn't retain
we mustn't retain
you mustn't retain
they mustn't retain

V-ing form

I mustn't be retaining
you mustn't be retaining
he mustn't be retaining
we mustn't be retaining
you mustn't be retaining
they mustn't be retaining

Perfect

I mustn't have retained
you mustn't have retained
he mustn't have retained
we mustn't have retained
you mustn't have retained
they mustn't have retained

V-ing perfect

I mustn't have been retaining
you mustn't have been retaining
he mustn't have been retaining
we mustn't have been retaining
you mustn't have been retaining
they mustn't have been retaining

Interrogative form

Simple form

must I retain?
must you retain?
must he retain?
must we retain?
must you retain?
must they retain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

mustn't I retain?
mustn't you retain?
mustn't he retain?
mustn't we retain?
mustn't you retain?
mustn't they retain?

V-ing form

mustn't I be retaining?
mustn't you be retaining?
mustn't he be retaining?
mustn't we be retaining?
mustn't you be retaining?
mustn't they be retaining?

Perfect

mustn't I have retained?
mustn't you have retained?
mustn't he have retained?
mustn't we have retained?
mustn't you have retained?
mustn't they have retained?

V-ing perfect

mustn't I have been retaining?
mustn't you have been retaining?
mustn't he have been retaining?
mustn't we have been retaining?
mustn't you have been retaining?
mustn't they have been retaining?

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