English verb conjugation MUST SIGH

Regular verb: sigh - sighed - sighed

Affirmation

Simple form

I must sigh
you must sigh
he must sigh
we must sigh
you must sigh
they must sigh

V-ing form

I must be sighing
you must be sighing
he must be sighing
we must be sighing
you must be sighing
they must be sighing

Perfect

I must have sighed
you must have sighed
he must have sighed
we must have sighed
you must have sighed
they must have sighed

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I sigh?
must you sigh?
must he sigh?
must we sigh?
must you sigh?
must they sigh?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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