English verb conjugation COULD IMPUGN

Regular verb: impugn - impugned - impugned

Affirmation

Simple form

I could impugn
you could impugn
he could impugn
we could impugn
you could impugn
they could impugn

V-ing form

I could be impugning
you could be impugning
he could be impugning
we could be impugning
you could be impugning
they could be impugning

Perfect

I could have impugned
you could have impugned
he could have impugned
we could have impugned
you could have impugned
they could have impugned

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I impugn?
could you impugn?
could he impugn?
could we impugn?
could you impugn?
could they impugn?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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