could stick
Verbo irregular: stick - stuck- stuck

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could stick
you could stick
he could stick
we could stick
you could stick
they could stick 	I could be sticking
you could be sticking
he could be sticking
we could be sticking
you could be sticking
they could be sticking	I could have stuck
you could have stuck
he could have stuck
we could have stuck
you could have stuck
they could have stuck	I could have been sticking
you could have been sticking
he could have been sticking
we could have been sticking
you could have been sticking
they could have been sticking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't stick
you couldn't stick
he couldn't stick
we couldn't stick
you couldn't stick
they couldn't stick 	I couldn't be sticking
you couldn't be sticking
he couldn't be sticking
we couldn't be sticking
you couldn't be sticking
they couldn't be sticking	I couldn't have stuck
you couldn't have stuck
he couldn't have stuck
we couldn't have stuck
you couldn't have stuck
they couldn't have stuck	I couldn't have been sticking
you couldn't have been sticking
he couldn't have been sticking
we couldn't have been sticking
you couldn't have been sticking
they couldn't have been sticking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I stick?
could you stick?
could he stick?
could we stick?
could you stick?
could they stick? 	could I be sticking?
could you be sticking?
could he be sticking?
could we be sticking?
could you be sticking?
could they be sticking? 	could I have stuck?
could you have stuck?
could he have stuck?
could we have stuck?
could you have stuck?
could they have stuck? 	could I have been sticking?
could you have been sticking?
could he have been sticking?
could we have been sticking?
could you have been sticking?
could they have been sticking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I stick?
couldn't you stick?
couldn't he stick?
couldn't we stick?
couldn't you stick?
couldn't they stick? 	couldn't I be sticking?
couldn't you be sticking?
couldn't he be sticking?
couldn't we be sticking?
couldn't you be sticking?
couldn't they be sticking? 	couldn't I have stuck?
couldn't you have stuck?
couldn't he have stuck?
couldn't we have stuck?
couldn't you have stuck?
couldn't they have stuck? 	couldn't I have been sticking?
couldn't you have been sticking?
couldn't he have been sticking?
couldn't we have been sticking?
couldn't you have been sticking?
couldn't they have been sticking?