English verb conjugation COULD DEMONSTRATE

Regular verb: demonstrate - demonstrated - demonstrated

Affirmation

Simple form

I could demonstrate
you could demonstrate
he could demonstrate
we could demonstrate
you could demonstrate
they could demonstrate

V-ing form

I could be demonstrating
you could be demonstrating
he could be demonstrating
we could be demonstrating
you could be demonstrating
they could be demonstrating

Perfect

I could have demonstrated
you could have demonstrated
he could have demonstrated
we could have demonstrated
you could have demonstrated
they could have demonstrated

V-ing perfect

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

Negation

Simple form

I could not demonstrate
you could not demonstrate
he could not demonstrate
we could not demonstrate
you could not demonstrate
they could not demonstrate

V-ing form

I could not be demonstrating
you could not be demonstrating
he could not be demonstrating
we could not be demonstrating
you could not be demonstrating
they could not be demonstrating

Perfect

I could not have demonstrated
you could not have demonstrated
he could not have demonstrated
we could not have demonstrated
you could not have demonstrated
they could not have demonstrated

V-ing perfect

I could not have been demonstrating
you could not have been demonstrating
he could not have been demonstrating
we could not have been demonstrating
you could not have been demonstrating
they could not have been demonstrating

Interrogative form

Simple form

could I demonstrate?
could you demonstrate?
could he demonstrate?
could we demonstrate?
could you demonstrate?
could they demonstrate?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

could I not demonstrate?
could you not demonstrate?
could he not demonstrate?
could we not demonstrate?
could you not demonstrate?
could they not demonstrate?

V-ing form

could I not be demonstrating?
could you not be demonstrating?
could he not be demonstrating?
could we not be demonstrating?
could you not be demonstrating?
could they not be demonstrating?

Perfect

could I not have demonstrated?
could you not have demonstrated?
could he not have demonstrated?
could we not have demonstrated?
could you not have demonstrated?
could they not have demonstrated?

V-ing perfect

could I not have been demonstrating?
could you not have been demonstrating?
could he not have been demonstrating?
could we not have been demonstrating?
could you not have been demonstrating?
could they not have been demonstrating?

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