could nobble
Regular verb: nobble - nobbled- nobbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could nobble
you could nobble
she could nobble
we could nobble
you could nobble
they could nobble 	I could be nobbling
you could be nobbling
she could be nobbling
we could be nobbling
you could be nobbling
they could be nobbling	I could have nobbled
you could have nobbled
she could have nobbled
we could have nobbled
you could have nobbled
they could have nobbled	I could have been nobbling
you could have been nobbling
she could have been nobbling
we could have been nobbling
you could have been nobbling
they could have been nobbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't nobble
you couldn't nobble
she couldn't nobble
we couldn't nobble
you couldn't nobble
they couldn't nobble 	I couldn't be nobbling
you couldn't be nobbling
she couldn't be nobbling
we couldn't be nobbling
you couldn't be nobbling
they couldn't be nobbling	I couldn't have nobbled
you couldn't have nobbled
she couldn't have nobbled
we couldn't have nobbled
you couldn't have nobbled
they couldn't have nobbled	I couldn't have been nobbling
you couldn't have been nobbling
she couldn't have been nobbling
we couldn't have been nobbling
you couldn't have been nobbling
they couldn't have been nobbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I nobble?
could you nobble?
could she nobble?
could we nobble?
could you nobble?
could they nobble? 	could I be nobbling?
could you be nobbling?
could she be nobbling?
could we be nobbling?
could you be nobbling?
could they be nobbling? 	could I have nobbled?
could you have nobbled?
could she have nobbled?
could we have nobbled?
could you have nobbled?
could they have nobbled? 	could I have been nobbling?
could you have been nobbling?
could she have been nobbling?
could we have been nobbling?
could you have been nobbling?
could they have been nobbling? 	

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