English verb conjugation COULD MAINTAIN

Regular verb: maintain - maintained - maintained

Affirmation

Simple form

I could maintain
you could maintain
she could maintain
we could maintain
you could maintain
they could maintain

V-ing form

I could be maintaining
you could be maintaining
she could be maintaining
we could be maintaining
you could be maintaining
they could be maintaining

Perfect

I could have maintained
you could have maintained
she could have maintained
we could have maintained
you could have maintained
they could have maintained

V-ing perfect

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

Negation

Simple form

I could not maintain
you could not maintain
she could not maintain
we could not maintain
you could not maintain
they could not maintain

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I maintain?
could you maintain?
could she maintain?
could we maintain?
could you maintain?
could they maintain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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