English verb conjugation COULD SUPPLEMENT

Regular verb: supplement - supplemented - supplemented

Affirmation

Simple form

I could supplement
you could supplement
he could supplement
we could supplement
you could supplement
they could supplement

V-ing form

I could be supplementing
you could be supplementing
he could be supplementing
we could be supplementing
you could be supplementing
they could be supplementing

Perfect

I could have supplemented
you could have supplemented
he could have supplemented
we could have supplemented
you could have supplemented
they could have supplemented

V-ing perfect

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

Negation

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I supplement?
could you supplement?
could he supplement?
could we supplement?
could you supplement?
could they supplement?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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