could bob
Verbo regular: bob - bobbed- bobbed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could bob
you could bob
she could bob
we could bob
you could bob
they could bob 	I could be bobbing
you could be bobbing
she could be bobbing
we could be bobbing
you could be bobbing
they could be bobbing	I could have bobbed
you could have bobbed
she could have bobbed
we could have bobbed
you could have bobbed
they could have bobbed	I could have been bobbing
you could have been bobbing
she could have been bobbing
we could have been bobbing
you could have been bobbing
they could have been bobbing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not bob
you could not bob
she could not bob
we could not bob
you could not bob
they could not bob 	I could not be bobbing
you could not be bobbing
she could not be bobbing
we could not be bobbing
you could not be bobbing
they could not be bobbing	I could not have bobbed
you could not have bobbed
she could not have bobbed
we could not have bobbed
you could not have bobbed
they could not have bobbed	I could not have been bobbing
you could not have been bobbing
she could not have been bobbing
we could not have been bobbing
you could not have been bobbing
they could not have been bobbing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I bob?
could you bob?
could she bob?
could we bob?
could you bob?
could they bob? 	could I be bobbing?
could you be bobbing?
could she be bobbing?
could we be bobbing?
could you be bobbing?
could they be bobbing? 	could I have bobbed?
could you have bobbed?
could she have bobbed?
could we have bobbed?
could you have bobbed?
could they have bobbed? 	could I have been bobbing?
could you have been bobbing?
could she have been bobbing?
could we have been bobbing?
could you have been bobbing?
could they have been bobbing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not bob?
could you not bob?
could she not bob?
could we not bob?
could you not bob?
could they not bob? 	could I not be bobbing?
could you not be bobbing?
could she not be bobbing?
could we not be bobbing?
could you not be bobbing?
could they not be bobbing? 	could I not have bobbed?
could you not have bobbed?
could she not have bobbed?
could we not have bobbed?
could you not have bobbed?
could they not have bobbed? 	could I not have been bobbing?
could you not have been bobbing?
could she not have been bobbing?
could we not have been bobbing?
could you not have been bobbing?
could they not have been bobbing?