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 couldn't compare you couldn't compare she couldn't compare we couldn't compare you couldn't compare they couldn't compare	I couldn't be comparing you couldn't be comparing she couldn't be comparing we couldn't be comparing you couldn't be comparing they couldn't be comparing
Perfect	V-ing perfect
I couldn't have compared you couldn't have compared she couldn't have compared we couldn't have compared you couldn't have compared they couldn't have compared	I couldn't have been comparing you couldn't have been comparing she couldn't have been comparing we couldn't have been comparing you couldn't have been comparing they couldn't 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
couldn't I compare? couldn't you compare? couldn't she compare? couldn't we compare? couldn't you compare? couldn't they compare?	couldn't I be comparing? couldn't you be comparing? couldn't she be comparing? couldn't we be comparing? couldn't you be comparing? couldn't they be comparing?
Perfect	V-ing perfect
couldn't I have compared? couldn't you have compared? couldn't she have compared? couldn't we have compared? couldn't you have compared? couldn't they have compared?	couldn't I have been comparing? couldn't you have been comparing? couldn't she have been comparing? couldn't we have been comparing? couldn't you have been comparing? couldn't they have been comparing?