English verb conjugation COULD OVERGRADE

Regular verb: overgrade - overgraded - overgraded

Affirmation

Simple form

I could overgrade
you could overgrade
she could overgrade
we could overgrade
you could overgrade
they could overgrade

V-ing form

I could be overgrading
you could be overgrading
she could be overgrading
we could be overgrading
you could be overgrading
they could be overgrading

Perfect

I could have overgraded
you could have overgraded
she could have overgraded
we could have overgraded
you could have overgraded
they could have overgraded

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I overgrade?
could you overgrade?
could she overgrade?
could we overgrade?
could you overgrade?
could they overgrade?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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