English verb conjugation MUST LIGHTEN

Regular verb: lighten - lightened - lightened

Affirmation

Simple form

I must lighten
you must lighten
she must lighten
we must lighten
you must lighten
they must lighten

V-ing form

I must be lightening
you must be lightening
she must be lightening
we must be lightening
you must be lightening
they must be lightening

Perfect

I must have lightened
you must have lightened
she must have lightened
we must have lightened
you must have lightened
they must have lightened

V-ing perfect

I must have been lightening
you must have been lightening
she must have been lightening
we must have been lightening
you must have been lightening
they must have been lightening

Negation

Simple form

I mustn't lighten
you mustn't lighten
she mustn't lighten
we mustn't lighten
you mustn't lighten
they mustn't lighten

V-ing form

I mustn't be lightening
you mustn't be lightening
she mustn't be lightening
we mustn't be lightening
you mustn't be lightening
they mustn't be lightening

Perfect

I mustn't have lightened
you mustn't have lightened
she mustn't have lightened
we mustn't have lightened
you mustn't have lightened
they mustn't have lightened

V-ing perfect

I mustn't have been lightening
you mustn't have been lightening
she mustn't have been lightening
we mustn't have been lightening
you mustn't have been lightening
they mustn't have been lightening

Interrogative form

Simple form

must I lighten?
must you lighten?
must she lighten?
must we lighten?
must you lighten?
must they lighten?

V-ing form

must I be lightening?
must you be lightening?
must she be lightening?
must we be lightening?
must you be lightening?
must they be lightening?

Perfect

must I have lightened?
must you have lightened?
must she have lightened?
must we have lightened?
must you have lightened?
must they have lightened?

V-ing perfect

must I have been lightening?
must you have been lightening?
must she have been lightening?
must we have been lightening?
must you have been lightening?
must they have been lightening?

Interro-negative form

Simple form

mustn't I lighten?
mustn't you lighten?
mustn't she lighten?
mustn't we lighten?
mustn't you lighten?
mustn't they lighten?

V-ing form

mustn't I be lightening?
mustn't you be lightening?
mustn't she be lightening?
mustn't we be lightening?
mustn't you be lightening?
mustn't they be lightening?

Perfect

mustn't I have lightened?
mustn't you have lightened?
mustn't she have lightened?
mustn't we have lightened?
mustn't you have lightened?
mustn't they have lightened?

V-ing perfect

mustn't I have been lightening?
mustn't you have been lightening?
mustn't she have been lightening?
mustn't we have been lightening?
mustn't you have been lightening?
mustn't they have been lightening?

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