English verb conjugation MUST STAIN

Regular verb: stain - stained - stained

Affirmation

Simple form

I must stain
you must stain
he must stain
we must stain
you must stain
they must stain

V-ing form

I must be staining
you must be staining
he must be staining
we must be staining
you must be staining
they must be staining

Perfect

I must have stained
you must have stained
he must have stained
we must have stained
you must have stained
they must have stained

V-ing perfect

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

Negation

Simple form

I must not stain
you must not stain
he must not stain
we must not stain
you must not stain
they must not stain

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I stain?
must you stain?
must he stain?
must we stain?
must you stain?
must they stain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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