could source
Verbo regolare: source - sourced- sourced

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could source
you could source
he could source
we could source
you could source
they could source 	I could be sourcing
you could be sourcing
he could be sourcing
we could be sourcing
you could be sourcing
they could be sourcing	I could have sourced
you could have sourced
he could have sourced
we could have sourced
you could have sourced
they could have sourced	I could have been sourcing
you could have been sourcing
he could have been sourcing
we could have been sourcing
you could have been sourcing
they could have been sourcing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't source
you couldn't source
he couldn't source
we couldn't source
you couldn't source
they couldn't source 	I couldn't be sourcing
you couldn't be sourcing
he couldn't be sourcing
we couldn't be sourcing
you couldn't be sourcing
they couldn't be sourcing	I couldn't have sourced
you couldn't have sourced
he couldn't have sourced
we couldn't have sourced
you couldn't have sourced
they couldn't have sourced	I couldn't have been sourcing
you couldn't have been sourcing
he couldn't have been sourcing
we couldn't have been sourcing
you couldn't have been sourcing
they couldn't have been sourcing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I source?
could you source?
could he source?
could we source?
could you source?
could they source? 	could I be sourcing?
could you be sourcing?
could he be sourcing?
could we be sourcing?
could you be sourcing?
could they be sourcing? 	could I have sourced?
could you have sourced?
could he have sourced?
could we have sourced?
could you have sourced?
could they have sourced? 	could I have been sourcing?
could you have been sourcing?
could he have been sourcing?
could we have been sourcing?
could you have been sourcing?
could they have been sourcing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I source?
couldn't you source?
couldn't he source?
couldn't we source?
couldn't you source?
couldn't they source? 	couldn't I be sourcing?
couldn't you be sourcing?
couldn't he be sourcing?
couldn't we be sourcing?
couldn't you be sourcing?
couldn't they be sourcing? 	couldn't I have sourced?
couldn't you have sourced?
couldn't he have sourced?
couldn't we have sourced?
couldn't you have sourced?
couldn't they have sourced? 	couldn't I have been sourcing?
couldn't you have been sourcing?
couldn't he have been sourcing?
couldn't we have been sourcing?
couldn't you have been sourcing?
couldn't they have been sourcing?