English verb conjugation MUST HEIGHTEN

Regular verb: heighten - heightened - heightened

Affirmation

Simple form

I must heighten
you must heighten
he must heighten
we must heighten
you must heighten
they must heighten

V-ing form

I must be heightening
you must be heightening
he must be heightening
we must be heightening
you must be heightening
they must be heightening

Perfect

I must have heightened
you must have heightened
he must have heightened
we must have heightened
you must have heightened
they must have heightened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I heighten?
must you heighten?
must he heighten?
must we heighten?
must you heighten?
must they heighten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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