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 can't fax
you can't fax
he can't fax
we can't fax
you can't fax
they can't fax 	I can't be faxing
you can't be faxing
he can't be faxing
we can't be faxing
you can't be faxing
they can't be faxing	I can't have faxed
you can't have faxed
he can't have faxed
we can't have faxed
you can't have faxed
they can't have faxed	I can't have been faxing
you can't have been faxing
he can't have been faxing
we can't have been faxing
you can't have been faxing
they can't 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't I fax?
can't you fax?
can't he fax?
can't we fax?
can't you fax?
can't they fax? 	can't I be faxing?
can't you be faxing?
can't he be faxing?
can't we be faxing?
can't you be faxing?
can't they be faxing? 	can't I have faxed?
can't you have faxed?
can't he have faxed?
can't we have faxed?
can't you have faxed?
can't they have faxed? 	can't I have been faxing?
can't you have been faxing?
can't he have been faxing?
can't we have been faxing?
can't you have been faxing?
can't they have been faxing?