English verb conjugation COULD RETROGRADE

Regular verb: retrograde - retrograded - retrograded

Affirmation

Simple form

I could retrograde
you could retrograde
he could retrograde
we could retrograde
you could retrograde
they could retrograde

V-ing form

I could be retrograding
you could be retrograding
he could be retrograding
we could be retrograding
you could be retrograding
they could be retrograding

Perfect

I could have retrograded
you could have retrograded
he could have retrograded
we could have retrograded
you could have retrograded
they could have retrograded

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I retrograde?
could you retrograde?
could he retrograde?
could we retrograde?
could you retrograde?
could they retrograde?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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