English verb conjugation CAN KEEN

Regular verb: keen - keened - keened

Affirmation

Simple form

I can keen
you can keen
he can keen
we can keen
you can keen
they can keen

V-ing form

I can be keening
you can be keening
he can be keening
we can be keening
you can be keening
they can be keening

Perfect

I can have keened
you can have keened
he can have keened
we can have keened
you can have keened
they can have keened

V-ing perfect

I can have been keening
you can have been keening
he can have been keening
we can have been keening
you can have been keening
they can have been keening

Negation

Simple form

I can't keen
you can't keen
he can't keen
we can't keen
you can't keen
they can't keen

V-ing form

I can't be keening
you can't be keening
he can't be keening
we can't be keening
you can't be keening
they can't be keening

Perfect

I can't have keened
you can't have keened
he can't have keened
we can't have keened
you can't have keened
they can't have keened

V-ing perfect

I can't have been keening
you can't have been keening
he can't have been keening
we can't have been keening
you can't have been keening
they can't have been keening

Interrogative form

Simple form

can I keen?
can you keen?
can he keen?
can we keen?
can you keen?
can they keen?

V-ing form

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

Perfect

can I have keened?
can you have keened?
can he have keened?
can we have keened?
can you have keened?
can they have keened?

V-ing perfect

can I have been keening?
can you have been keening?
can he have been keening?
can we have been keening?
can you have been keening?
can they have been keening?

Interro-negative form

Simple form

can't I keen?
can't you keen?
can't he keen?
can't we keen?
can't you keen?
can't they keen?

V-ing form

can't I be keening?
can't you be keening?
can't he be keening?
can't we be keening?
can't you be keening?
can't they be keening?

Perfect

can't I have keened?
can't you have keened?
can't he have keened?
can't we have keened?
can't you have keened?
can't they have keened?

V-ing perfect

can't I have been keening?
can't you have been keening?
can't he have been keening?
can't we have been keening?
can't you have been keening?
can't they have been keening?

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