English verb conjugation
COULD COMPARE

Regular verb: compare - compared - compared

Affirmation

Simple form	V-ing form
I could compare you could compare she could compare we could compare you could compare they could compare	I could be comparing you could be comparing she could be comparing we could be comparing you could be comparing they could be comparing
Perfect	V-ing perfect
I could have compared you could have compared she could have compared we could have compared you could have compared they could have compared	I could have been comparing you could have been comparing she could have been comparing we could have been comparing you could have been comparing they could have been comparing

Negation

Simple form	V-ing form
I could not compare you could not compare she could not compare we could not compare you could not compare they could not compare	I could not be comparing you could not be comparing she could not be comparing we could not be comparing you could not be comparing they could not be comparing
Perfect	V-ing perfect
I could not have compared you could not have compared she could not have compared we could not have compared you could not have compared they could not have compared	I could not have been comparing you could not have been comparing she could not have been comparing we could not have been comparing you could not have been comparing they could not have been comparing

Interrogative form

Simple form	V-ing form
could I compare? could you compare? could she compare? could we compare? could you compare? could they compare?	could I be comparing? could you be comparing? could she be comparing? could we be comparing? could you be comparing? could they be comparing?
Perfect	V-ing perfect
could I have compared? could you have compared? could she have compared? could we have compared? could you have compared? could they have compared?	could I have been comparing? could you have been comparing? could she have been comparing? could we have been comparing? could you have been comparing? could they have been comparing?

Interro-negative form

Simple form	V-ing form
could I not compare? could you not compare? could she not compare? could we not compare? could you not compare? could they not compare?	could I not be comparing? could you not be comparing? could she not be comparing? could we not be comparing? could you not be comparing? could they not be comparing?
Perfect	V-ing perfect
could I not have compared? could you not have compared? could she not have compared? could we not have compared? could you not have compared? could they not have compared?	could I not have been comparing? could you not have been comparing? could she not have been comparing? could we not have been comparing? could you not have been comparing? could they not have been comparing?