English verb conjugation MUST CROAK

Regular verb: croak - croaked - croaked

Affirmation

Simple form

I must croak
you must croak
he must croak
we must croak
you must croak
they must croak

V-ing form

I must be croaking
you must be croaking
he must be croaking
we must be croaking
you must be croaking
they must be croaking

Perfect

I must have croaked
you must have croaked
he must have croaked
we must have croaked
you must have croaked
they must have croaked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I croak?
must you croak?
must he croak?
must we croak?
must you croak?
must they croak?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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