I can compare you can compare he can compare we can compare you can compare they can compare
Forma con V-ing
I can be comparing you can be comparing he can be comparing we can be comparing you can be comparing they can be comparing
Perfecto
I can have compared you can have compared he can have compared we can have compared you can have compared they can have compared
Perfecto con V-ing
I can have been comparing you can have been comparing he can have been comparing we can have been comparing you can have been comparing they can have been comparing
Negación
Forma simple
I can't compare you can't compare he can't compare we can't compare you can't compare they can't compare
Forma con V-ing
I can't be comparing you can't be comparing he can't be comparing we can't be comparing you can't be comparing they can't be comparing
Perfecto
I can't have compared you can't have compared he can't have compared we can't have compared you can't have compared they can't have compared
Perfecto con V-ing
I can't have been comparing you can't have been comparing he can't have been comparing we can't have been comparing you can't have been comparing they can't have been comparing
Forma interrogativa
Forma simple
can I compare? can you compare? can he compare? can we compare? can you compare? can they compare?
Forma con V-ing
can I be comparing? can you be comparing? can he be comparing? can we be comparing? can you be comparing? can they be comparing?
Perfecto
can I have compared? can you have compared? can he have compared? can we have compared? can you have compared? can they have compared?
Perfecto con V-ing
can I have been comparing? can you have been comparing? can he have been comparing? can we have been comparing? can you have been comparing? can they have been comparing?
Forma interro-negativa
Forma simple
can't I compare? can't you compare? can't he compare? can't we compare? can't you compare? can't they compare?
Forma con V-ing
can't I be comparing? can't you be comparing? can't he be comparing? can't we be comparing? can't you be comparing? can't they be comparing?
Perfecto
can't I have compared? can't you have compared? can't he have compared? can't we have compared? can't you have compared? can't they have compared?
Perfecto con V-ing
can't I have been comparing? can't you have been comparing? can't he have been comparing? can't we have been comparing? can't you have been comparing? can't they have been comparing?