English verb conjugation MUST SOFTEN

Regular verb: soften - softened - softened

Affirmation

Simple form

I must soften
you must soften
he must soften
we must soften
you must soften
they must soften

V-ing form

I must be softening
you must be softening
he must be softening
we must be softening
you must be softening
they must be softening

Perfect

I must have softened
you must have softened
he must have softened
we must have softened
you must have softened
they must have softened

V-ing perfect

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

Negation

Simple form

I must not soften
you must not soften
he must not soften
we must not soften
you must not soften
they must not soften

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I soften?
must you soften?
must he soften?
must we soften?
must you soften?
must they soften?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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