I can combine you can combine he can combine we can combine you can combine they can combine
Forma con V-ing
I can be combining you can be combining he can be combining we can be combining you can be combining they can be combining
Perfecto
I can have combined you can have combined he can have combined we can have combined you can have combined they can have combined
Perfecto con V-ing
I can have been combining you can have been combining he can have been combining we can have been combining you can have been combining they can have been combining
Negación
Forma simple
I can't combine you can't combine he can't combine we can't combine you can't combine they can't combine
Forma con V-ing
I can't be combining you can't be combining he can't be combining we can't be combining you can't be combining they can't be combining
Perfecto
I can't have combined you can't have combined he can't have combined we can't have combined you can't have combined they can't have combined
Perfecto con V-ing
I can't have been combining you can't have been combining he can't have been combining we can't have been combining you can't have been combining they can't have been combining
Forma interrogativa
Forma simple
can I combine? can you combine? can he combine? can we combine? can you combine? can they combine?
Forma con V-ing
can I be combining? can you be combining? can he be combining? can we be combining? can you be combining? can they be combining?
Perfecto
can I have combined? can you have combined? can he have combined? can we have combined? can you have combined? can they have combined?
Perfecto con V-ing
can I have been combining? can you have been combining? can he have been combining? can we have been combining? can you have been combining? can they have been combining?
Forma interro-negativa
Forma simple
can't I combine? can't you combine? can't he combine? can't we combine? can't you combine? can't they combine?
Forma con V-ing
can't I be combining? can't you be combining? can't he be combining? can't we be combining? can't you be combining? can't they be combining?
Perfecto
can't I have combined? can't you have combined? can't he have combined? can't we have combined? can't you have combined? can't they have combined?
Perfecto con V-ing
can't I have been combining? can't you have been combining? can't he have been combining? can't we have been combining? can't you have been combining? can't they have been combining?