can curtain
Verbo regolare: curtain - curtained- curtained

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I can curtain
you can curtain
he can curtain
we can curtain
you can curtain
they can curtain 	I can be curtaining
you can be curtaining
he can be curtaining
we can be curtaining
you can be curtaining
they can be curtaining	I can have curtained
you can have curtained
he can have curtained
we can have curtained
you can have curtained
they can have curtained	I can have been curtaining
you can have been curtaining
he can have been curtaining
we can have been curtaining
you can have been curtaining
they can have been curtaining	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I cannot curtain
you cannot curtain
he cannot curtain
we cannot curtain
you cannot curtain
they cannot curtain 	I cannot be curtaining
you cannot be curtaining
he cannot be curtaining
we cannot be curtaining
you cannot be curtaining
they cannot be curtaining	I cannot have curtained
you cannot have curtained
he cannot have curtained
we cannot have curtained
you cannot have curtained
they cannot have curtained	I cannot have been curtaining
you cannot have been curtaining
he cannot have been curtaining
we cannot have been curtaining
you cannot have been curtaining
they cannot have been curtaining	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I curtain?
can you curtain?
can he curtain?
can we curtain?
can you curtain?
can they curtain? 	can I be curtaining?
can you be curtaining?
can he be curtaining?
can we be curtaining?
can you be curtaining?
can they be curtaining? 	can I have curtained?
can you have curtained?
can he have curtained?
can we have curtained?
can you have curtained?
can they have curtained? 	can I have been curtaining?
can you have been curtaining?
can he have been curtaining?
can we have been curtaining?
can you have been curtaining?
can they have been curtaining? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
can I not curtain?
can you not curtain?
can he not curtain?
can we not curtain?
can you not curtain?
can they not curtain? 	can I not be curtaining?
can you not be curtaining?
can he not be curtaining?
can we not be curtaining?
can you not be curtaining?
can they not be curtaining? 	can I not have curtained?
can you not have curtained?
can he not have curtained?
can we not have curtained?
can you not have curtained?
can they not have curtained? 	can I not have been curtaining?
can you not have been curtaining?
can he not have been curtaining?
can we not have been curtaining?
can you not have been curtaining?
can they not have been curtaining?