could mark
Verbo regolare: mark - marked- marked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could mark
you could mark
she could mark
we could mark
you could mark
they could mark 	I could be marking
you could be marking
she could be marking
we could be marking
you could be marking
they could be marking	I could have marked
you could have marked
she could have marked
we could have marked
you could have marked
they could have marked	I could have been marking
you could have been marking
she could have been marking
we could have been marking
you could have been marking
they could have been marking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not mark
you could not mark
she could not mark
we could not mark
you could not mark
they could not mark 	I could not be marking
you could not be marking
she could not be marking
we could not be marking
you could not be marking
they could not be marking	I could not have marked
you could not have marked
she could not have marked
we could not have marked
you could not have marked
they could not have marked	I could not have been marking
you could not have been marking
she could not have been marking
we could not have been marking
you could not have been marking
they could not have been marking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I mark?
could you mark?
could she mark?
could we mark?
could you mark?
could they mark? 	could I be marking?
could you be marking?
could she be marking?
could we be marking?
could you be marking?
could they be marking? 	could I have marked?
could you have marked?
could she have marked?
could we have marked?
could you have marked?
could they have marked? 	could I have been marking?
could you have been marking?
could she have been marking?
could we have been marking?
could you have been marking?
could they have been marking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not mark?
could you not mark?
could she not mark?
could we not mark?
could you not mark?
could they not mark? 	could I not be marking?
could you not be marking?
could she not be marking?
could we not be marking?
could you not be marking?
could they not be marking? 	could I not have marked?
could you not have marked?
could she not have marked?
could we not have marked?
could you not have marked?
could they not have marked? 	could I not have been marking?
could you not have been marking?
could she not have been marking?
could we not have been marking?
could you not have been marking?
could they not have been marking?