English verb conjugation MUST IMPAIR

Regular verb: impair - impaired - impaired

Affirmation

Simple form

I must impair
you must impair
he must impair
we must impair
you must impair
they must impair

V-ing form

I must be impairing
you must be impairing
he must be impairing
we must be impairing
you must be impairing
they must be impairing

Perfect

I must have impaired
you must have impaired
he must have impaired
we must have impaired
you must have impaired
they must have impaired

V-ing perfect

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

Negation

Simple form

I must not impair
you must not impair
he must not impair
we must not impair
you must not impair
they must not impair

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

must I impair?
must you impair?
must he impair?
must we impair?
must you impair?
must they impair?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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