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
he 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
he 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
he 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
he 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
he 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
he 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
he 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
he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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 he 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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