English verb conjugation COULD ECHO

Regular verb: echo - echoed - echoed


Affirmation

Simple form

I could echo
you could echo
he could echo
we could echo
you could echo
they could echo

V-ing form

I could be echoing
you could be echoing
he could be echoing
we could be echoing
you could be echoing
they could be echoing

Perfect

I could have echoed
you could have echoed
he could have echoed
we could have echoed
you could have echoed
they could have echoed

V-ing perfect

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

Negation

Simple form

I could not echo
you could not echo
he could not echo
we could not echo
you could not echo
they could not echo

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I echo?
could you echo?
could he echo?
could we echo?
could you echo?
could they echo?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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