English verb conjugation COULD THUMBTACK

Regular verb: thumbtack - thumbtacked - thumbtacked

Affirmation

Simple form

I could thumbtack
you could thumbtack
she could thumbtack
we could thumbtack
you could thumbtack
they could thumbtack

V-ing form

I could be thumbtacking
you could be thumbtacking
she could be thumbtacking
we could be thumbtacking
you could be thumbtacking
they could be thumbtacking

Perfect

I could have thumbtacked
you could have thumbtacked
she could have thumbtacked
we could have thumbtacked
you could have thumbtacked
they could have thumbtacked

V-ing perfect

I could have been thumbtacking
you could have been thumbtacking
she could have been thumbtacking
we could have been thumbtacking
you could have been thumbtacking
they could have been thumbtacking

Negation

Simple form

I couldn't thumbtack
you couldn't thumbtack
she couldn't thumbtack
we couldn't thumbtack
you couldn't thumbtack
they couldn't thumbtack

V-ing form

I couldn't be thumbtacking
you couldn't be thumbtacking
she couldn't be thumbtacking
we couldn't be thumbtacking
you couldn't be thumbtacking
they couldn't be thumbtacking

Perfect

I couldn't have thumbtacked
you couldn't have thumbtacked
she couldn't have thumbtacked
we couldn't have thumbtacked
you couldn't have thumbtacked
they couldn't have thumbtacked

V-ing perfect

I couldn't have been thumbtacking
you couldn't have been thumbtacking
she couldn't have been thumbtacking
we couldn't have been thumbtacking
you couldn't have been thumbtacking
they couldn't have been thumbtacking

Interrogative form

Simple form

could I thumbtack?
could you thumbtack?
could she thumbtack?
could we thumbtack?
could you thumbtack?
could they thumbtack?

V-ing form

could I be thumbtacking?
could you be thumbtacking?
could she be thumbtacking?
could we be thumbtacking?
could you be thumbtacking?
could they be thumbtacking?

Perfect

could I have thumbtacked?
could you have thumbtacked?
could she have thumbtacked?
could we have thumbtacked?
could you have thumbtacked?
could they have thumbtacked?

V-ing perfect

could I have been thumbtacking?
could you have been thumbtacking?
could she have been thumbtacking?
could we have been thumbtacking?
could you have been thumbtacking?
could they have been thumbtacking?

Interro-negative form

Simple form

couldn't I thumbtack?
couldn't you thumbtack?
couldn't she thumbtack?
couldn't we thumbtack?
couldn't you thumbtack?
couldn't they thumbtack?

V-ing form

couldn't I be thumbtacking?
couldn't you be thumbtacking?
couldn't she be thumbtacking?
couldn't we be thumbtacking?
couldn't you be thumbtacking?
couldn't they be thumbtacking?

Perfect

couldn't I have thumbtacked?
couldn't you have thumbtacked?
couldn't she have thumbtacked?
couldn't we have thumbtacked?
couldn't you have thumbtacked?
couldn't they have thumbtacked?

V-ing perfect

couldn't I have been thumbtacking?
couldn't you have been thumbtacking?
couldn't she have been thumbtacking?
couldn't we have been thumbtacking?
couldn't you have been thumbtacking?
couldn't they have been thumbtacking?

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