English verb conjugation COULD DO DO

Regular verb: do do - do doed - do doed

Warning, this verb may not exist. Conjugation is given as example.

Affirmation

Simple form

I could do do
you could do do
she could do do
we could do do
you could do do
they could do do

V-ing form

I could be do doing
you could be do doing
she could be do doing
we could be do doing
you could be do doing
they could be do doing

Perfect

I could have do doed
you could have do doed
she could have do doed
we could have do doed
you could have do doed
they could have do doed

V-ing perfect

I could have been do doing
you could have been do doing
she could have been do doing
we could have been do doing
you could have been do doing
they could have been do doing

Negation

Simple form

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

V-ing form

I couldn't be do doing
you couldn't be do doing
she couldn't be do doing
we couldn't be do doing
you couldn't be do doing
they couldn't be do doing

Perfect

I couldn't have do doed
you couldn't have do doed
she couldn't have do doed
we couldn't have do doed
you couldn't have do doed
they couldn't have do doed

V-ing perfect

I couldn't have been do doing
you couldn't have been do doing
she couldn't have been do doing
we couldn't have been do doing
you couldn't have been do doing
they couldn't have been do doing

Interrogative form

Simple form

could I do do?
could you do do?
could she do do?
could we do do?
could you do do?
could they do do?

V-ing form

could I be do doing?
could you be do doing?
could she be do doing?
could we be do doing?
could you be do doing?
could they be do doing?

Perfect

could I have do doed?
could you have do doed?
could she have do doed?
could we have do doed?
could you have do doed?
could they have do doed?

V-ing perfect

could I have been do doing?
could you have been do doing?
could she have been do doing?
could we have been do doing?
could you have been do doing?
could they have been do doing?

Interro-negative form

Simple form

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

V-ing form

couldn't I be do doing?
couldn't you be do doing?
couldn't she be do doing?
couldn't we be do doing?
couldn't you be do doing?
couldn't they be do doing?

Perfect

couldn't I have do doed?
couldn't you have do doed?
couldn't she have do doed?
couldn't we have do doed?
couldn't you have do doed?
couldn't they have do doed?

V-ing perfect

couldn't I have been do doing?
couldn't you have been do doing?
couldn't she have been do doing?
couldn't we have been do doing?
couldn't you have been do doing?
couldn't they have been do doing?

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