could unnerve
Regular verb: unnerve - unnerved- unnerved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unnerve
you could unnerve
she could unnerve
we could unnerve
you could unnerve
they could unnerve 	I could be unnerving
you could be unnerving
she could be unnerving
we could be unnerving
you could be unnerving
they could be unnerving	I could have unnerved
you could have unnerved
she could have unnerved
we could have unnerved
you could have unnerved
they could have unnerved	I could have been unnerving
you could have been unnerving
she could have been unnerving
we could have been unnerving
you could have been unnerving
they could have been unnerving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unnerve
you couldn't unnerve
she couldn't unnerve
we couldn't unnerve
you couldn't unnerve
they couldn't unnerve 	I couldn't be unnerving
you couldn't be unnerving
she couldn't be unnerving
we couldn't be unnerving
you couldn't be unnerving
they couldn't be unnerving	I couldn't have unnerved
you couldn't have unnerved
she couldn't have unnerved
we couldn't have unnerved
you couldn't have unnerved
they couldn't have unnerved	I couldn't have been unnerving
you couldn't have been unnerving
she couldn't have been unnerving
we couldn't have been unnerving
you couldn't have been unnerving
they couldn't have been unnerving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unnerve?
could you unnerve?
could she unnerve?
could we unnerve?
could you unnerve?
could they unnerve? 	could I be unnerving?
could you be unnerving?
could she be unnerving?
could we be unnerving?
could you be unnerving?
could they be unnerving? 	could I have unnerved?
could you have unnerved?
could she have unnerved?
could we have unnerved?
could you have unnerved?
could they have unnerved? 	could I have been unnerving?
could you have been unnerving?
could she have been unnerving?
could we have been unnerving?
could you have been unnerving?
could they have been unnerving? 	

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