could pen
Verbo regolare: pen - penned- penned

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could pen
you could pen
he could pen
we could pen
you could pen
they could pen 	I could be penning
you could be penning
he could be penning
we could be penning
you could be penning
they could be penning	I could have penned
you could have penned
he could have penned
we could have penned
you could have penned
they could have penned	I could have been penning
you could have been penning
he could have been penning
we could have been penning
you could have been penning
they could have been penning	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't pen
you couldn't pen
he couldn't pen
we couldn't pen
you couldn't pen
they couldn't pen 	I couldn't be penning
you couldn't be penning
he couldn't be penning
we couldn't be penning
you couldn't be penning
they couldn't be penning	I couldn't have penned
you couldn't have penned
he couldn't have penned
we couldn't have penned
you couldn't have penned
they couldn't have penned	I couldn't have been penning
you couldn't have been penning
he couldn't have been penning
we couldn't have been penning
you couldn't have been penning
they couldn't have been penning	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I pen?
could you pen?
could he pen?
could we pen?
could you pen?
could they pen? 	could I be penning?
could you be penning?
could he be penning?
could we be penning?
could you be penning?
could they be penning? 	could I have penned?
could you have penned?
could he have penned?
could we have penned?
could you have penned?
could they have penned? 	could I have been penning?
could you have been penning?
could he have been penning?
could we have been penning?
could you have been penning?
could they have been penning? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I pen?
couldn't you pen?
couldn't he pen?
couldn't we pen?
couldn't you pen?
couldn't they pen? 	couldn't I be penning?
couldn't you be penning?
couldn't he be penning?
couldn't we be penning?
couldn't you be penning?
couldn't they be penning? 	couldn't I have penned?
couldn't you have penned?
couldn't he have penned?
couldn't we have penned?
couldn't you have penned?
couldn't they have penned? 	couldn't I have been penning?
couldn't you have been penning?
couldn't he have been penning?
couldn't we have been penning?
couldn't you have been penning?
couldn't they have been penning?