English verb conjugation MUST COUGH

Regular verb: cough - coughed - coughed

Affirmation

Simple form

I must cough
you must cough
he must cough
we must cough
you must cough
they must cough

V-ing form

I must be coughing
you must be coughing
he must be coughing
we must be coughing
you must be coughing
they must be coughing

Perfect

I must have coughed
you must have coughed
he must have coughed
we must have coughed
you must have coughed
they must have coughed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I cough?
must you cough?
must he cough?
must we cough?
must you cough?
must they cough?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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