English verb conjugation MUST CREAK

Regular verb: creak - creaked - creaked

Affirmation

Simple form

I must creak
you must creak
he must creak
we must creak
you must creak
they must creak

V-ing form

I must be creaking
you must be creaking
he must be creaking
we must be creaking
you must be creaking
they must be creaking

Perfect

I must have creaked
you must have creaked
he must have creaked
we must have creaked
you must have creaked
they must have creaked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I creak?
must you creak?
must he creak?
must we creak?
must you creak?
must they creak?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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