English verb conjugation COULD KEEN

Regular verb: keen - keened - keened

Affirmation

Simple form

I could keen
you could keen
he could keen
we could keen
you could keen
they could keen

V-ing form

I could be keening
you could be keening
he could be keening
we could be keening
you could be keening
they could be keening

Perfect

I could have keened
you could have keened
he 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
he 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
he 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
he 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
he 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
he 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 he keen?
could we keen?
could you keen?
could they keen?

V-ing form

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

Perfect

could I have keened?
could you have keened?
could he 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 he 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 he 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 he 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 he 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 he 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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