English verb conjugation MUST CRUMPLE

Regular verb: crumple - crumpled - crumpled

Affirmation

Simple form

I must crumple
you must crumple
he must crumple
we must crumple
you must crumple
they must crumple

V-ing form

I must be crumpling
you must be crumpling
he must be crumpling
we must be crumpling
you must be crumpling
they must be crumpling

Perfect

I must have crumpled
you must have crumpled
he must have crumpled
we must have crumpled
you must have crumpled
they must have crumpled

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I crumple?
must you crumple?
must he crumple?
must we crumple?
must you crumple?
must they crumple?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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