I could nobble you could nobble she could nobble we could nobble you could nobble they could nobble
V-ing form
I could be nobbling you could be nobbling she could be nobbling we could be nobbling you could be nobbling they could be nobbling
Perfect
I could have nobbled you could have nobbled she could have nobbled we could have nobbled you could have nobbled they could have nobbled
V-ing perfect
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
I could not nobble you could not nobble she could not nobble we could not nobble you could not nobble they could not nobble
V-ing form
I could not be nobbling you could not be nobbling she could not be nobbling we could not be nobbling you could not be nobbling they could not be nobbling
Perfect
I could not have nobbled you could not have nobbled she could not have nobbled we could not have nobbled you could not have nobbled they could not have nobbled
V-ing perfect
I could not have been nobbling you could not have been nobbling she could not have been nobbling we could not have been nobbling you could not have been nobbling they could not have been nobbling
Interrogative form
Simple form
could I nobble? could you nobble? could she nobble? could we nobble? could you nobble? could they nobble?
V-ing form
could I be nobbling? could you be nobbling? could she be nobbling? could we be nobbling? could you be nobbling? could they be nobbling?
Perfect
could I have nobbled? could you have nobbled? could she have nobbled? could we have nobbled? could you have nobbled? could they have nobbled?
V-ing perfect
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
could I not nobble? could you not nobble? could she not nobble? could we not nobble? could you not nobble? could they not nobble?
V-ing form
could I not be nobbling? could you not be nobbling? could she not be nobbling? could we not be nobbling? could you not be nobbling? could they not be nobbling?
Perfect
could I not have nobbled? could you not have nobbled? could she not have nobbled? could we not have nobbled? could you not have nobbled? could they not have nobbled?
V-ing perfect
could I not have been nobbling? could you not have been nobbling? could she not have been nobbling? could we not have been nobbling? could you not have been nobbling? could they not have been nobbling?