English verb conjugation COULD KEEN

Regular verb: keen - keened - keened

Affirmation

Simple form

I could keen
you could keen
she could keen
we could keen
you could keen
they could keen

V-ing form

I could be keening
you could be keening
she could be keening
we could be keening
you could be keening
they could be keening

Perfect

I could have keened
you could have keened
she could have keened
we could have keened
you could have keened
they could have keened

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I keen?
could you keen?
could she keen?
could we keen?
could you keen?
could they keen?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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