can fax
Verbo regular: fax - faxed- faxed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can fax
you can fax
he can fax
we can fax
you can fax
they can fax 	I can be faxing
you can be faxing
he can be faxing
we can be faxing
you can be faxing
they can be faxing	I can have faxed
you can have faxed
he can have faxed
we can have faxed
you can have faxed
they can have faxed	I can have been faxing
you can have been faxing
he can have been faxing
we can have been faxing
you can have been faxing
they can have been faxing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot fax
you cannot fax
he cannot fax
we cannot fax
you cannot fax
they cannot fax 	I cannot be faxing
you cannot be faxing
he cannot be faxing
we cannot be faxing
you cannot be faxing
they cannot be faxing	I cannot have faxed
you cannot have faxed
he cannot have faxed
we cannot have faxed
you cannot have faxed
they cannot have faxed	I cannot have been faxing
you cannot have been faxing
he cannot have been faxing
we cannot have been faxing
you cannot have been faxing
they cannot have been faxing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I fax?
can you fax?
can he fax?
can we fax?
can you fax?
can they fax? 	can I be faxing?
can you be faxing?
can he be faxing?
can we be faxing?
can you be faxing?
can they be faxing? 	can I have faxed?
can you have faxed?
can he have faxed?
can we have faxed?
can you have faxed?
can they have faxed? 	can I have been faxing?
can you have been faxing?
can he have been faxing?
can we have been faxing?
can you have been faxing?
can they have been faxing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not fax?
can you not fax?
can he not fax?
can we not fax?
can you not fax?
can they not fax? 	can I not be faxing?
can you not be faxing?
can he not be faxing?
can we not be faxing?
can you not be faxing?
can they not be faxing? 	can I not have faxed?
can you not have faxed?
can he not have faxed?
can we not have faxed?
can you not have faxed?
can they not have faxed? 	can I not have been faxing?
can you not have been faxing?
can he not have been faxing?
can we not have been faxing?
can you not have been faxing?
can they not have been faxing?