could sail
Verbo regular: sail - sailed- sailed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could sail
you could sail
she could sail
we could sail
you could sail
they could sail 	I could be sailing
you could be sailing
she could be sailing
we could be sailing
you could be sailing
they could be sailing	I could have sailed
you could have sailed
she could have sailed
we could have sailed
you could have sailed
they could have sailed	I could have been sailing
you could have been sailing
she could have been sailing
we could have been sailing
you could have been sailing
they could have been sailing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not sail
you could not sail
she could not sail
we could not sail
you could not sail
they could not sail 	I could not be sailing
you could not be sailing
she could not be sailing
we could not be sailing
you could not be sailing
they could not be sailing	I could not have sailed
you could not have sailed
she could not have sailed
we could not have sailed
you could not have sailed
they could not have sailed	I could not have been sailing
you could not have been sailing
she could not have been sailing
we could not have been sailing
you could not have been sailing
they could not have been sailing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I sail?
could you sail?
could she sail?
could we sail?
could you sail?
could they sail? 	could I be sailing?
could you be sailing?
could she be sailing?
could we be sailing?
could you be sailing?
could they be sailing? 	could I have sailed?
could you have sailed?
could she have sailed?
could we have sailed?
could you have sailed?
could they have sailed? 	could I have been sailing?
could you have been sailing?
could she have been sailing?
could we have been sailing?
could you have been sailing?
could they have been sailing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not sail?
could you not sail?
could she not sail?
could we not sail?
could you not sail?
could they not sail? 	could I not be sailing?
could you not be sailing?
could she not be sailing?
could we not be sailing?
could you not be sailing?
could they not be sailing? 	could I not have sailed?
could you not have sailed?
could she not have sailed?
could we not have sailed?
could you not have sailed?
could they not have sailed? 	could I not have been sailing?
could you not have been sailing?
could she not have been sailing?
could we not have been sailing?
could you not have been sailing?
could they not have been sailing?