English verb conjugation MUST CRIB

Regular verb: crib - cribbed - cribbed

Affirmation

Simple form

I must crib
you must crib
he must crib
we must crib
you must crib
they must crib

V-ing form

I must be cribbing
you must be cribbing
he must be cribbing
we must be cribbing
you must be cribbing
they must be cribbing

Perfect

I must have cribbed
you must have cribbed
he must have cribbed
we must have cribbed
you must have cribbed
they must have cribbed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I crib?
must you crib?
must he crib?
must we crib?
must you crib?
must they crib?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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