English verb conjugation COULD UNTACK

Regular verb: untack - untacked - untacked

Affirmation

Simple form

I could untack
you could untack
he could untack
we could untack
you could untack
they could untack

V-ing form

I could be untacking
you could be untacking
he could be untacking
we could be untacking
you could be untacking
they could be untacking

Perfect

I could have untacked
you could have untacked
he could have untacked
we could have untacked
you could have untacked
they could have untacked

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I untack?
could you untack?
could he untack?
could we untack?
could you untack?
could they untack?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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