English verb conjugation MUST SHEATHE

Regular verb: sheathe - sheathed - sheathed

Affirmation

Simple form

I must sheathe
you must sheathe
he must sheathe
we must sheathe
you must sheathe
they must sheathe

V-ing form

I must be sheathing
you must be sheathing
he must be sheathing
we must be sheathing
you must be sheathing
they must be sheathing

Perfect

I must have sheathed
you must have sheathed
he must have sheathed
we must have sheathed
you must have sheathed
they must have sheathed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sheathe?
must you sheathe?
must he sheathe?
must we sheathe?
must you sheathe?
must they sheathe?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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