can bob
Verbo regular: bob - bobbed- bobbed

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

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot bob
you cannot bob
he cannot bob
we cannot bob
you cannot bob
they cannot bob 	I cannot be bobbing
you cannot be bobbing
he cannot be bobbing
we cannot be bobbing
you cannot be bobbing
they cannot be bobbing	I cannot have bobbed
you cannot have bobbed
he cannot have bobbed
we cannot have bobbed
you cannot have bobbed
they cannot have bobbed	I cannot have been bobbing
you cannot have been bobbing
he cannot have been bobbing
we cannot have been bobbing
you cannot have been bobbing
they cannot have been bobbing	

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

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