could telephone
Verbo regular: telephone - telephoned- telephoned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could telephone
you could telephone
he could telephone
we could telephone
you could telephone
they could telephone 	I could be telephoning
you could be telephoning
he could be telephoning
we could be telephoning
you could be telephoning
they could be telephoning	I could have telephoned
you could have telephoned
he could have telephoned
we could have telephoned
you could have telephoned
they could have telephoned	I could have been telephoning
you could have been telephoning
he could have been telephoning
we could have been telephoning
you could have been telephoning
they could have been telephoning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't telephone
you couldn't telephone
he couldn't telephone
we couldn't telephone
you couldn't telephone
they couldn't telephone 	I couldn't be telephoning
you couldn't be telephoning
he couldn't be telephoning
we couldn't be telephoning
you couldn't be telephoning
they couldn't be telephoning	I couldn't have telephoned
you couldn't have telephoned
he couldn't have telephoned
we couldn't have telephoned
you couldn't have telephoned
they couldn't have telephoned	I couldn't have been telephoning
you couldn't have been telephoning
he couldn't have been telephoning
we couldn't have been telephoning
you couldn't have been telephoning
they couldn't have been telephoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I telephone?
could you telephone?
could he telephone?
could we telephone?
could you telephone?
could they telephone? 	could I be telephoning?
could you be telephoning?
could he be telephoning?
could we be telephoning?
could you be telephoning?
could they be telephoning? 	could I have telephoned?
could you have telephoned?
could he have telephoned?
could we have telephoned?
could you have telephoned?
could they have telephoned? 	could I have been telephoning?
could you have been telephoning?
could he have been telephoning?
could we have been telephoning?
could you have been telephoning?
could they have been telephoning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I telephone?
couldn't you telephone?
couldn't he telephone?
couldn't we telephone?
couldn't you telephone?
couldn't they telephone? 	couldn't I be telephoning?
couldn't you be telephoning?
couldn't he be telephoning?
couldn't we be telephoning?
couldn't you be telephoning?
couldn't they be telephoning? 	couldn't I have telephoned?
couldn't you have telephoned?
couldn't he have telephoned?
couldn't we have telephoned?
couldn't you have telephoned?
couldn't they have telephoned? 	couldn't I have been telephoning?
couldn't you have been telephoning?
couldn't he have been telephoning?
couldn't we have been telephoning?
couldn't you have been telephoning?
couldn't they have been telephoning?