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 mustn't weaken
you mustn't weaken
he mustn't weaken
we mustn't weaken
you mustn't weaken
they mustn't weaken

V-ing form

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

Perfect

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

V-ing perfect

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

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

V-ing form

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

Perfect

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

V-ing perfect

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

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