can upgrade
Verbo regular: upgrade - upgraded- upgraded

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can upgrade
you can upgrade
she can upgrade
we can upgrade
you can upgrade
they can upgrade 	I can be upgrading
you can be upgrading
she can be upgrading
we can be upgrading
you can be upgrading
they can be upgrading	I can have upgraded
you can have upgraded
she can have upgraded
we can have upgraded
you can have upgraded
they can have upgraded	I can have been upgrading
you can have been upgrading
she can have been upgrading
we can have been upgrading
you can have been upgrading
they can have been upgrading	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot upgrade
you cannot upgrade
she cannot upgrade
we cannot upgrade
you cannot upgrade
they cannot upgrade 	I cannot be upgrading
you cannot be upgrading
she cannot be upgrading
we cannot be upgrading
you cannot be upgrading
they cannot be upgrading	I cannot have upgraded
you cannot have upgraded
she cannot have upgraded
we cannot have upgraded
you cannot have upgraded
they cannot have upgraded	I cannot have been upgrading
you cannot have been upgrading
she cannot have been upgrading
we cannot have been upgrading
you cannot have been upgrading
they cannot have been upgrading	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I upgrade?
can you upgrade?
can she upgrade?
can we upgrade?
can you upgrade?
can they upgrade? 	can I be upgrading?
can you be upgrading?
can she be upgrading?
can we be upgrading?
can you be upgrading?
can they be upgrading? 	can I have upgraded?
can you have upgraded?
can she have upgraded?
can we have upgraded?
can you have upgraded?
can they have upgraded? 	can I have been upgrading?
can you have been upgrading?
can she have been upgrading?
can we have been upgrading?
can you have been upgrading?
can they have been upgrading? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not upgrade?
can you not upgrade?
can she not upgrade?
can we not upgrade?
can you not upgrade?
can they not upgrade? 	can I not be upgrading?
can you not be upgrading?
can she not be upgrading?
can we not be upgrading?
can you not be upgrading?
can they not be upgrading? 	can I not have upgraded?
can you not have upgraded?
can she not have upgraded?
can we not have upgraded?
can you not have upgraded?
can they not have upgraded? 	can I not have been upgrading?
can you not have been upgrading?
can she not have been upgrading?
can we not have been upgrading?
can you not have been upgrading?
can they not have been upgrading?