English verb conjugation MUST DARKEN

Regular verb: darken - darkened - darkened

Affirmation

Simple form

I must darken
you must darken
he must darken
we must darken
you must darken
they must darken

V-ing form

I must be darkening
you must be darkening
he must be darkening
we must be darkening
you must be darkening
they must be darkening

Perfect

I must have darkened
you must have darkened
he must have darkened
we must have darkened
you must have darkened
they must have darkened

V-ing perfect

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

Negation

Simple form

I must not darken
you must not darken
he must not darken
we must not darken
you must not darken
they must not darken

V-ing form

I must not be darkening
you must not be darkening
he must not be darkening
we must not be darkening
you must not be darkening
they must not be darkening

Perfect

I must not have darkened
you must not have darkened
he must not have darkened
we must not have darkened
you must not have darkened
they must not have darkened

V-ing perfect

I must not have been darkening
you must not have been darkening
he must not have been darkening
we must not have been darkening
you must not have been darkening
they must not have been darkening

Interrogative form

Simple form

must I darken?
must you darken?
must he darken?
must we darken?
must you darken?
must they darken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

must I not darken?
must you not darken?
must he not darken?
must we not darken?
must you not darken?
must they not darken?

V-ing form

must I not be darkening?
must you not be darkening?
must he not be darkening?
must we not be darkening?
must you not be darkening?
must they not be darkening?

Perfect

must I not have darkened?
must you not have darkened?
must he not have darkened?
must we not have darkened?
must you not have darkened?
must they not have darkened?

V-ing perfect

must I not have been darkening?
must you not have been darkening?
must he not have been darkening?
must we not have been darkening?
must you not have been darkening?
must they not have been darkening?

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