male gender | Modal : no | may | might | can | could | shall | should | will | would | must | ought to
English verb conjugation COULD DISCOVER
Regular verb: discover - discovered - discovered
Affirmation
Simple form
I could discoveryou could discover
she could discover
we could discover
you could discover
they could discover
V-ing form
I could be discoveringyou could be discovering
she could be discovering
we could be discovering
you could be discovering
they could be discovering
Perfect
I could have discoveredyou could have discovered
she could have discovered
we could have discovered
you could have discovered
they could have discovered
V-ing perfect
I could have been discoveringyou could have been discovering
she could have been discovering
we could have been discovering
you could have been discovering
they could have been discovering
Negation
Simple form
I could not discoveryou could not discover
she could not discover
we could not discover
you could not discover
they could not discover
V-ing form
I could not be discoveringyou could not be discovering
she could not be discovering
we could not be discovering
you could not be discovering
they could not be discovering
Perfect
I could not have discoveredyou could not have discovered
she could not have discovered
we could not have discovered
you could not have discovered
they could not have discovered
V-ing perfect
I could not have been discoveringyou could not have been discovering
she could not have been discovering
we could not have been discovering
you could not have been discovering
they could not have been discovering
Interrogative form
Simple form
could I discover?could you discover?
could she discover?
could we discover?
could you discover?
could they discover?
V-ing form
could I be discovering?could you be discovering?
could she be discovering?
could we be discovering?
could you be discovering?
could they be discovering?
Perfect
could I have discovered?could you have discovered?
could she have discovered?
could we have discovered?
could you have discovered?
could they have discovered?
V-ing perfect
could I have been discovering?could you have been discovering?
could she have been discovering?
could we have been discovering?
could you have been discovering?
could they have been discovering?
Interro-negative form
Simple form
could I not discover?could you not discover?
could she not discover?
could we not discover?
could you not discover?
could they not discover?
V-ing form
could I not be discovering?could you not be discovering?
could she not be discovering?
could we not be discovering?
could you not be discovering?
could they not be discovering?
Perfect
could I not have discovered?could you not have discovered?
could she not have discovered?
could we not have discovered?
could you not have discovered?
could they not have discovered?
V-ing perfect
could I not have been discovering?could you not have been discovering?
could she not have been discovering?
could we not have been discovering?
could you not have been discovering?
could they not have been discovering?