English verb conjugation MUST WEAKEN

Regular verb: weaken - weakened - weakened

Affirmation

Simple form

I must weaken
you must weaken
he must weaken
we must weaken
you must weaken
they must weaken

V-ing form

I must be weakening
you must be weakening
he must be weakening
we must be weakening
you must be weakening
they must be weakening

Perfect

I must have weakened
you must have weakened
he must have weakened
we must have weakened
you must have weakened
they must have weakened

V-ing perfect

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

Negation

Simple form

I must not weaken
you must not weaken
he must not weaken
we must not weaken
you must not weaken
they must not weaken

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I weaken?
must you weaken?
must he weaken?
must we weaken?
must you weaken?
must they weaken?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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