The Conjugator
English verb conjugation
CAN CONCERN

Regular verb: concern - concerned - concerned

Affirmation

Simple form

V-ing form

I can concern
you can concern
she can concern
we can concern
you can concern
they can concern
I can be concerning
you can be concerning
she can be concerning
we can be concerning
you can be concerning
they can be concerning

Perfect

V-ing perfect

I can have concerned
you can have concerned
she can have concerned
we can have concerned
you can have concerned
they can have concerned
I can have been concerning
you can have been concerning
she can have been concerning
we can have been concerning
you can have been concerning
they can have been concerning

Negation

Simple form

V-ing form

I can't concern
you can't concern
she can't concern
we can't concern
you can't concern
they can't concern
I can't be concerning
you can't be concerning
she can't be concerning
we can't be concerning
you can't be concerning
they can't be concerning

Perfect

V-ing perfect

I can't have concerned
you can't have concerned
she can't have concerned
we can't have concerned
you can't have concerned
they can't have concerned
I can't have been concerning
you can't have been concerning
she can't have been concerning
we can't have been concerning
you can't have been concerning
they can't have been concerning

Interrogative form

Simple form

V-ing form

can I concern?
can you concern?
can she concern?
can we concern?
can you concern?
can they concern?
can I be concerning?
can you be concerning?
can she be concerning?
can we be concerning?
can you be concerning?
can they be concerning?

Perfect

V-ing perfect

can I have concerned?
can you have concerned?
can she have concerned?
can we have concerned?
can you have concerned?
can they have concerned?
can I have been concerning?
can you have been concerning?
can she have been concerning?
can we have been concerning?
can you have been concerning?
can they have been concerning?

Interro-negative form

Simple form

V-ing form

can't I concern?
can't you concern?
can't she concern?
can't we concern?
can't you concern?
can't they concern?
can't I be concerning?
can't you be concerning?
can't she be concerning?
can't we be concerning?
can't you be concerning?
can't they be concerning?

Perfect

V-ing perfect

can't I have concerned?
can't you have concerned?
can't she have concerned?
can't we have concerned?
can't you have concerned?
can't they have concerned?
can't I have been concerning?
can't you have been concerning?
can't she have been concerning?
can't we have been concerning?
can't you have been concerning?
can't they have been concerning?