can chug
Regular verb: chug - chugged- chugged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can chug
you can chug
she can chug
we can chug
you can chug
they can chug 	I can be chugging
you can be chugging
she can be chugging
we can be chugging
you can be chugging
they can be chugging	I can have chugged
you can have chugged
she can have chugged
we can have chugged
you can have chugged
they can have chugged	I can have been chugging
you can have been chugging
she can have been chugging
we can have been chugging
you can have been chugging
they can have been chugging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot chug
you cannot chug
she cannot chug
we cannot chug
you cannot chug
they cannot chug 	I cannot be chugging
you cannot be chugging
she cannot be chugging
we cannot be chugging
you cannot be chugging
they cannot be chugging	I cannot have chugged
you cannot have chugged
she cannot have chugged
we cannot have chugged
you cannot have chugged
they cannot have chugged	I cannot have been chugging
you cannot have been chugging
she cannot have been chugging
we cannot have been chugging
you cannot have been chugging
they cannot have been chugging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I chug?
can you chug?
can she chug?
can we chug?
can you chug?
can they chug? 	can I be chugging?
can you be chugging?
can she be chugging?
can we be chugging?
can you be chugging?
can they be chugging? 	can I have chugged?
can you have chugged?
can she have chugged?
can we have chugged?
can you have chugged?
can they have chugged? 	can I have been chugging?
can you have been chugging?
can she have been chugging?
can we have been chugging?
can you have been chugging?
can they have been chugging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not chug?
can you not chug?
can she not chug?
can we not chug?
can you not chug?
can they not chug? 	can I not be chugging?
can you not be chugging?
can she not be chugging?
can we not be chugging?
can you not be chugging?
can they not be chugging? 	can I not have chugged?
can you not have chugged?
can she not have chugged?
can we not have chugged?
can you not have chugged?
can they not have chugged? 	can I not have been chugging?
can you not have been chugging?
can she not have been chugging?
can we not have been chugging?
can you not have been chugging?
can they not have been chugging?