could chug
Verbo regular: chug - chugged- chugged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could chug
you could chug
he could chug
we could chug
you could chug
they could chug 	I could be chugging
you could be chugging
he could be chugging
we could be chugging
you could be chugging
they could be chugging	I could have chugged
you could have chugged
he could have chugged
we could have chugged
you could have chugged
they could have chugged	I could have been chugging
you could have been chugging
he could have been chugging
we could have been chugging
you could have been chugging
they could have been chugging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't chug
you couldn't chug
he couldn't chug
we couldn't chug
you couldn't chug
they couldn't chug 	I couldn't be chugging
you couldn't be chugging
he couldn't be chugging
we couldn't be chugging
you couldn't be chugging
they couldn't be chugging	I couldn't have chugged
you couldn't have chugged
he couldn't have chugged
we couldn't have chugged
you couldn't have chugged
they couldn't have chugged	I couldn't have been chugging
you couldn't have been chugging
he couldn't have been chugging
we couldn't have been chugging
you couldn't have been chugging
they couldn't have been chugging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I chug?
could you chug?
could he chug?
could we chug?
could you chug?
could they chug? 	could I be chugging?
could you be chugging?
could he be chugging?
could we be chugging?
could you be chugging?
could they be chugging? 	could I have chugged?
could you have chugged?
could he have chugged?
could we have chugged?
could you have chugged?
could they have chugged? 	could I have been chugging?
could you have been chugging?
could he have been chugging?
could we have been chugging?
could you have been chugging?
could they have been chugging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I chug?
couldn't you chug?
couldn't he chug?
couldn't we chug?
couldn't you chug?
couldn't they chug? 	couldn't I be chugging?
couldn't you be chugging?
couldn't he be chugging?
couldn't we be chugging?
couldn't you be chugging?
couldn't they be chugging? 	couldn't I have chugged?
couldn't you have chugged?
couldn't he have chugged?
couldn't we have chugged?
couldn't you have chugged?
couldn't they have chugged? 	couldn't I have been chugging?
couldn't you have been chugging?
couldn't he have been chugging?
couldn't we have been chugging?
couldn't you have been chugging?
couldn't they have been chugging?