English verb conjugation
CAN COMPARE

Regular verb: compare - compared - compared

Affirmation

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

Negation

Simple form	V-ing form
I can't compare you can't compare she can't compare we can't compare you can't compare they can't compare	I can't be comparing you can't be comparing she can't be comparing we can't be comparing you can't be comparing they can't be comparing
Perfect	V-ing perfect
I can't have compared you can't have compared she can't have compared we can't have compared you can't have compared they can't have compared	I can't have been comparing you can't have been comparing she can't have been comparing we can't have been comparing you can't have been comparing they can't have been comparing

Interrogative form

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

Interro-negative form

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