English verb conjugation COULD DUPLICATE

Regular verb: duplicate - duplicated - duplicated

Affirmation

Simple form

I could duplicate
you could duplicate
he could duplicate
we could duplicate
you could duplicate
they could duplicate

V-ing form

I could be duplicating
you could be duplicating
he could be duplicating
we could be duplicating
you could be duplicating
they could be duplicating

Perfect

I could have duplicated
you could have duplicated
he could have duplicated
we could have duplicated
you could have duplicated
they could have duplicated

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I duplicate?
could you duplicate?
could he duplicate?
could we duplicate?
could you duplicate?
could they duplicate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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