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 must not heighten
you must not heighten
he must not heighten
we must not heighten
you must not heighten
they must not heighten

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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