could negative
Regular verb: negative - negatived- negatived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could negative
you could negative
she could negative
we could negative
you could negative
they could negative 	I could be negativing
you could be negativing
she could be negativing
we could be negativing
you could be negativing
they could be negativing	I could have negatived
you could have negatived
she could have negatived
we could have negatived
you could have negatived
they could have negatived	I could have been negativing
you could have been negativing
she could have been negativing
we could have been negativing
you could have been negativing
they could have been negativing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't negative
you couldn't negative
she couldn't negative
we couldn't negative
you couldn't negative
they couldn't negative 	I couldn't be negativing
you couldn't be negativing
she couldn't be negativing
we couldn't be negativing
you couldn't be negativing
they couldn't be negativing	I couldn't have negatived
you couldn't have negatived
she couldn't have negatived
we couldn't have negatived
you couldn't have negatived
they couldn't have negatived	I couldn't have been negativing
you couldn't have been negativing
she couldn't have been negativing
we couldn't have been negativing
you couldn't have been negativing
they couldn't have been negativing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I negative?
could you negative?
could she negative?
could we negative?
could you negative?
could they negative? 	could I be negativing?
could you be negativing?
could she be negativing?
could we be negativing?
could you be negativing?
could they be negativing? 	could I have negatived?
could you have negatived?
could she have negatived?
could we have negatived?
could you have negatived?
could they have negatived? 	could I have been negativing?
could you have been negativing?
could she have been negativing?
could we have been negativing?
could you have been negativing?
could they have been negativing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I negative?
couldn't you negative?
couldn't she negative?
couldn't we negative?
couldn't you negative?
couldn't they negative? 	couldn't I be negativing?
couldn't you be negativing?
couldn't she be negativing?
couldn't we be negativing?
couldn't you be negativing?
couldn't they be negativing? 	couldn't I have negatived?
couldn't you have negatived?
couldn't she have negatived?
couldn't we have negatived?
couldn't you have negatived?
couldn't they have negatived? 	couldn't I have been negativing?
couldn't you have been negativing?
couldn't she have been negativing?
couldn't we have been negativing?
couldn't you have been negativing?
couldn't they have been negativing?