could wag
Regular verb: wag - wagged- wagged

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could wag
you could wag
she could wag
we could wag
you could wag
they could wag 	I could be wagging
you could be wagging
she could be wagging
we could be wagging
you could be wagging
they could be wagging	I could have wagged
you could have wagged
she could have wagged
we could have wagged
you could have wagged
they could have wagged	I could have been wagging
you could have been wagging
she could have been wagging
we could have been wagging
you could have been wagging
they could have been wagging	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not wag
you could not wag
she could not wag
we could not wag
you could not wag
they could not wag 	I could not be wagging
you could not be wagging
she could not be wagging
we could not be wagging
you could not be wagging
they could not be wagging	I could not have wagged
you could not have wagged
she could not have wagged
we could not have wagged
you could not have wagged
they could not have wagged	I could not have been wagging
you could not have been wagging
she could not have been wagging
we could not have been wagging
you could not have been wagging
they could not have been wagging	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I wag?
could you wag?
could she wag?
could we wag?
could you wag?
could they wag? 	could I be wagging?
could you be wagging?
could she be wagging?
could we be wagging?
could you be wagging?
could they be wagging? 	could I have wagged?
could you have wagged?
could she have wagged?
could we have wagged?
could you have wagged?
could they have wagged? 	could I have been wagging?
could you have been wagging?
could she have been wagging?
could we have been wagging?
could you have been wagging?
could they have been wagging? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not wag?
could you not wag?
could she not wag?
could we not wag?
could you not wag?
could they not wag? 	could I not be wagging?
could you not be wagging?
could she not be wagging?
could we not be wagging?
could you not be wagging?
could they not be wagging? 	could I not have wagged?
could you not have wagged?
could she not have wagged?
could we not have wagged?
could you not have wagged?
could they not have wagged? 	could I not have been wagging?
could you not have been wagging?
could she not have been wagging?
could we not have been wagging?
could you not have been wagging?
could they not have been wagging?