could combine
Verbo regolare: combine - combined- combined

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could combine
you could combine
he could combine
we could combine
you could combine
they could combine 	I could be combining
you could be combining
he could be combining
we could be combining
you could be combining
they could be combining	I could have combined
you could have combined
he could have combined
we could have combined
you could have combined
they could have combined	I could have been combining
you could have been combining
he could have been combining
we could have been combining
you could have been combining
they could have been combining	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't combine
you couldn't combine
he couldn't combine
we couldn't combine
you couldn't combine
they couldn't combine 	I couldn't be combining
you couldn't be combining
he couldn't be combining
we couldn't be combining
you couldn't be combining
they couldn't be combining	I couldn't have combined
you couldn't have combined
he couldn't have combined
we couldn't have combined
you couldn't have combined
they couldn't have combined	I couldn't have been combining
you couldn't have been combining
he couldn't have been combining
we couldn't have been combining
you couldn't have been combining
they couldn't have been combining	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I combine?
could you combine?
could he combine?
could we combine?
could you combine?
could they combine? 	could I be combining?
could you be combining?
could he be combining?
could we be combining?
could you be combining?
could they be combining? 	could I have combined?
could you have combined?
could he have combined?
could we have combined?
could you have combined?
could they have combined? 	could I have been combining?
could you have been combining?
could he have been combining?
could we have been combining?
could you have been combining?
could they have been combining? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I combine?
couldn't you combine?
couldn't he combine?
couldn't we combine?
couldn't you combine?
couldn't they combine? 	couldn't I be combining?
couldn't you be combining?
couldn't he be combining?
couldn't we be combining?
couldn't you be combining?
couldn't they be combining? 	couldn't I have combined?
couldn't you have combined?
couldn't he have combined?
couldn't we have combined?
couldn't you have combined?
couldn't they have combined? 	couldn't I have been combining?
couldn't you have been combining?
couldn't he have been combining?
couldn't we have been combining?
couldn't you have been combining?
couldn't they have been combining?