could bike
Regular verb: bike - biked- biked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't bike
you couldn't bike
she couldn't bike
we couldn't bike
you couldn't bike
they couldn't bike 	I couldn't be biking
you couldn't be biking
she couldn't be biking
we couldn't be biking
you couldn't be biking
they couldn't be biking	I couldn't have biked
you couldn't have biked
she couldn't have biked
we couldn't have biked
you couldn't have biked
they couldn't have biked	I couldn't have been biking
you couldn't have been biking
she couldn't have been biking
we couldn't have been biking
you couldn't have been biking
they couldn't have been biking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I bike?
couldn't you bike?
couldn't she bike?
couldn't we bike?
couldn't you bike?
couldn't they bike? 	couldn't I be biking?
couldn't you be biking?
couldn't she be biking?
couldn't we be biking?
couldn't you be biking?
couldn't they be biking? 	couldn't I have biked?
couldn't you have biked?
couldn't she have biked?
couldn't we have biked?
couldn't you have biked?
couldn't they have biked? 	couldn't I have been biking?
couldn't you have been biking?
couldn't she have been biking?
couldn't we have been biking?
couldn't you have been biking?
couldn't they have been biking?