English verb conjugation COULD THUMB

Regular verb: thumb - thumbed - thumbed

Affirmation

Simple form

I could thumb
you could thumb
she could thumb
we could thumb
you could thumb
they could thumb

V-ing form

I could be thumbing
you could be thumbing
she could be thumbing
we could be thumbing
you could be thumbing
they could be thumbing

Perfect

I could have thumbed
you could have thumbed
she could have thumbed
we could have thumbed
you could have thumbed
they could have thumbed

V-ing perfect

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

Negation

Simple form

I could not thumb
you could not thumb
she could not thumb
we could not thumb
you could not thumb
they could not thumb

V-ing form

I could not be thumbing
you could not be thumbing
she could not be thumbing
we could not be thumbing
you could not be thumbing
they could not be thumbing

Perfect

I could not have thumbed
you could not have thumbed
she could not have thumbed
we could not have thumbed
you could not have thumbed
they could not have thumbed

V-ing perfect

I could not have been thumbing
you could not have been thumbing
she could not have been thumbing
we could not have been thumbing
you could not have been thumbing
they could not have been thumbing

Interrogative form

Simple form

could I thumb?
could you thumb?
could she thumb?
could we thumb?
could you thumb?
could they thumb?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not thumb?
could you not thumb?
could she not thumb?
could we not thumb?
could you not thumb?
could they not thumb?

V-ing form

could I not be thumbing?
could you not be thumbing?
could she not be thumbing?
could we not be thumbing?
could you not be thumbing?
could they not be thumbing?

Perfect

could I not have thumbed?
could you not have thumbed?
could she not have thumbed?
could we not have thumbed?
could you not have thumbed?
could they not have thumbed?

V-ing perfect

could I not have been thumbing?
could you not have been thumbing?
could she not have been thumbing?
could we not have been thumbing?
could you not have been thumbing?
could they not have been thumbing?

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