English verb conjugation MUST TIGHTEN

Regular verb: tighten - tightened - tightened


Affirmation

Simple form

I must tighten
you must tighten
he must tighten
we must tighten
you must tighten
they must tighten

V-ing form

I must be tightening
you must be tightening
he must be tightening
we must be tightening
you must be tightening
they must be tightening

Perfect

I must have tightened
you must have tightened
he must have tightened
we must have tightened
you must have tightened
they must have tightened

V-ing perfect

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

Negation

Simple form

I must not tighten
you must not tighten
he must not tighten
we must not tighten
you must not tighten
they must not tighten

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I tighten?
must you tighten?
must he tighten?
must we tighten?
must you tighten?
must they tighten?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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