English verb conjugation COULD SMARTEN

Regular verb: smarten - smartened - smartened

Affirmation

Simple form

I could smarten
you could smarten
he could smarten
we could smarten
you could smarten
they could smarten

V-ing form

I could be smartening
you could be smartening
he could be smartening
we could be smartening
you could be smartening
they could be smartening

Perfect

I could have smartened
you could have smartened
he could have smartened
we could have smartened
you could have smartened
they could have smartened

V-ing perfect

I could have been smartening
you could have been smartening
he could have been smartening
we could have been smartening
you could have been smartening
they could have been smartening

Negation

Simple form

I couldn't smarten
you couldn't smarten
he couldn't smarten
we couldn't smarten
you couldn't smarten
they couldn't smarten

V-ing form

I couldn't be smartening
you couldn't be smartening
he couldn't be smartening
we couldn't be smartening
you couldn't be smartening
they couldn't be smartening

Perfect

I couldn't have smartened
you couldn't have smartened
he couldn't have smartened
we couldn't have smartened
you couldn't have smartened
they couldn't have smartened

V-ing perfect

I couldn't have been smartening
you couldn't have been smartening
he couldn't have been smartening
we couldn't have been smartening
you couldn't have been smartening
they couldn't have been smartening

Interrogative form

Simple form

could I smarten?
could you smarten?
could he smarten?
could we smarten?
could you smarten?
could they smarten?

V-ing form

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

Perfect

could I have smartened?
could you have smartened?
could he have smartened?
could we have smartened?
could you have smartened?
could they have smartened?

V-ing perfect

could I have been smartening?
could you have been smartening?
could he have been smartening?
could we have been smartening?
could you have been smartening?
could they have been smartening?

Interro-negative form

Simple form

couldn't I smarten?
couldn't you smarten?
couldn't he smarten?
couldn't we smarten?
couldn't you smarten?
couldn't they smarten?

V-ing form

couldn't I be smartening?
couldn't you be smartening?
couldn't he be smartening?
couldn't we be smartening?
couldn't you be smartening?
couldn't they be smartening?

Perfect

couldn't I have smartened?
couldn't you have smartened?
couldn't he have smartened?
couldn't we have smartened?
couldn't you have smartened?
couldn't they have smartened?

V-ing perfect

couldn't I have been smartening?
couldn't you have been smartening?
couldn't he have been smartening?
couldn't we have been smartening?
couldn't you have been smartening?
couldn't they have been smartening?

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