could tug
Verbo regular: tug - tugged- tugged

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could tug
you could tug
he could tug
we could tug
you could tug
they could tug 	I could be tugging
you could be tugging
he could be tugging
we could be tugging
you could be tugging
they could be tugging	I could have tugged
you could have tugged
he could have tugged
we could have tugged
you could have tugged
they could have tugged	I could have been tugging
you could have been tugging
he could have been tugging
we could have been tugging
you could have been tugging
they could have been tugging	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not tug
you could not tug
he could not tug
we could not tug
you could not tug
they could not tug 	I could not be tugging
you could not be tugging
he could not be tugging
we could not be tugging
you could not be tugging
they could not be tugging	I could not have tugged
you could not have tugged
he could not have tugged
we could not have tugged
you could not have tugged
they could not have tugged	I could not have been tugging
you could not have been tugging
he could not have been tugging
we could not have been tugging
you could not have been tugging
they could not have been tugging	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I tug?
could you tug?
could he tug?
could we tug?
could you tug?
could they tug? 	could I be tugging?
could you be tugging?
could he be tugging?
could we be tugging?
could you be tugging?
could they be tugging? 	could I have tugged?
could you have tugged?
could he have tugged?
could we have tugged?
could you have tugged?
could they have tugged? 	could I have been tugging?
could you have been tugging?
could he have been tugging?
could we have been tugging?
could you have been tugging?
could they have been tugging? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not tug?
could you not tug?
could he not tug?
could we not tug?
could you not tug?
could they not tug? 	could I not be tugging?
could you not be tugging?
could he not be tugging?
could we not be tugging?
could you not be tugging?
could they not be tugging? 	could I not have tugged?
could you not have tugged?
could he not have tugged?
could we not have tugged?
could you not have tugged?
could they not have tugged? 	could I not have been tugging?
could you not have been tugging?
could he not have been tugging?
could we not have been tugging?
could you not have been tugging?
could they not have been tugging?