could tab
Verbo regular: tab - tabed- tabed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could tab
you could tab
he could tab
we could tab
you could tab
they could tab 	I could be tabing
you could be tabing
he could be tabing
we could be tabing
you could be tabing
they could be tabing	I could have tabed
you could have tabed
he could have tabed
we could have tabed
you could have tabed
they could have tabed	I could have been tabing
you could have been tabing
he could have been tabing
we could have been tabing
you could have been tabing
they could have been tabing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not tab
you could not tab
he could not tab
we could not tab
you could not tab
they could not tab 	I could not be tabing
you could not be tabing
he could not be tabing
we could not be tabing
you could not be tabing
they could not be tabing	I could not have tabed
you could not have tabed
he could not have tabed
we could not have tabed
you could not have tabed
they could not have tabed	I could not have been tabing
you could not have been tabing
he could not have been tabing
we could not have been tabing
you could not have been tabing
they could not have been tabing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I tab?
could you tab?
could he tab?
could we tab?
could you tab?
could they tab? 	could I be tabing?
could you be tabing?
could he be tabing?
could we be tabing?
could you be tabing?
could they be tabing? 	could I have tabed?
could you have tabed?
could he have tabed?
could we have tabed?
could you have tabed?
could they have tabed? 	could I have been tabing?
could you have been tabing?
could he have been tabing?
could we have been tabing?
could you have been tabing?
could they have been tabing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not tab?
could you not tab?
could he not tab?
could we not tab?
could you not tab?
could they not tab? 	could I not be tabing?
could you not be tabing?
could he not be tabing?
could we not be tabing?
could you not be tabing?
could they not be tabing? 	could I not have tabed?
could you not have tabed?
could he not have tabed?
could we not have tabed?
could you not have tabed?
could they not have tabed? 	could I not have been tabing?
could you not have been tabing?
could he not have been tabing?
could we not have been tabing?
could you not have been tabing?
could they not have been tabing?