English verb conjugation COULD IMPAIR

Regular verb: impair - impaired - impaired

Affirmation

Simple form

I could impair
you could impair
he could impair
we could impair
you could impair
they could impair

V-ing form

I could be impairing
you could be impairing
he could be impairing
we could be impairing
you could be impairing
they could be impairing

Perfect

I could have impaired
you could have impaired
he could have impaired
we could have impaired
you could have impaired
they could have impaired

V-ing perfect

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

Negation

Simple form

I couldn't impair
you couldn't impair
he couldn't impair
we couldn't impair
you couldn't impair
they couldn't impair

V-ing form

I couldn't be impairing
you couldn't be impairing
he couldn't be impairing
we couldn't be impairing
you couldn't be impairing
they couldn't be impairing

Perfect

I couldn't have impaired
you couldn't have impaired
he couldn't have impaired
we couldn't have impaired
you couldn't have impaired
they couldn't have impaired

V-ing perfect

I couldn't have been impairing
you couldn't have been impairing
he couldn't have been impairing
we couldn't have been impairing
you couldn't have been impairing
they couldn't have been impairing

Interrogative form

Simple form

could I impair?
could you impair?
could he impair?
could we impair?
could you impair?
could they impair?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

couldn't I impair?
couldn't you impair?
couldn't he impair?
couldn't we impair?
couldn't you impair?
couldn't they impair?

V-ing form

couldn't I be impairing?
couldn't you be impairing?
couldn't he be impairing?
couldn't we be impairing?
couldn't you be impairing?
couldn't they be impairing?

Perfect

couldn't I have impaired?
couldn't you have impaired?
couldn't he have impaired?
couldn't we have impaired?
couldn't you have impaired?
couldn't they have impaired?

V-ing perfect

couldn't I have been impairing?
couldn't you have been impairing?
couldn't he have been impairing?
couldn't we have been impairing?
couldn't you have been impairing?
couldn't they have been impairing?

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