could bike
Verbo regular: bike - biked- biked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could bike
you could bike
she could bike
we could bike
you could bike
they could bike 	I could be biking
you could be biking
she could be biking
we could be biking
you could be biking
they could be biking	I could have biked
you could have biked
she could have biked
we could have biked
you could have biked
they could have biked	I could have been biking
you could have been biking
she could have been biking
we could have been biking
you could have been biking
they could have been biking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not bike
you could not bike
she could not bike
we could not bike
you could not bike
they could not bike 	I could not be biking
you could not be biking
she could not be biking
we could not be biking
you could not be biking
they could not be biking	I could not have biked
you could not have biked
she could not have biked
we could not have biked
you could not have biked
they could not have biked	I could not have been biking
you could not have been biking
she could not have been biking
we could not have been biking
you could not have been biking
they could not have been biking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I bike?
could you bike?
could she bike?
could we bike?
could you bike?
could they bike? 	could I be biking?
could you be biking?
could she be biking?
could we be biking?
could you be biking?
could they be biking? 	could I have biked?
could you have biked?
could she have biked?
could we have biked?
could you have biked?
could they have biked? 	could I have been biking?
could you have been biking?
could she have been biking?
could we have been biking?
could you have been biking?
could they have been biking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not bike?
could you not bike?
could she not bike?
could we not bike?
could you not bike?
could they not bike? 	could I not be biking?
could you not be biking?
could she not be biking?
could we not be biking?
could you not be biking?
could they not be biking? 	could I not have biked?
could you not have biked?
could she not have biked?
could we not have biked?
could you not have biked?
could they not have biked? 	could I not have been biking?
could you not have been biking?
could she not have been biking?
could we not have been biking?
could you not have been biking?
could they not have been biking?