I could yelp you could yelp she could yelp we could yelp you could yelp they could yelp
Forme en V-ing
I could be yelping you could be yelping she could be yelping we could be yelping you could be yelping they could be yelping
Perfect
I could have yelped you could have yelped she could have yelped we could have yelped you could have yelped they could have yelped
Perfect en V-ing
I could have been yelping you could have been yelping she could have been yelping we could have been yelping you could have been yelping they could have been yelping
Négation
Forme simple
I could not yelp you could not yelp she could not yelp we could not yelp you could not yelp they could not yelp
Forme en V-ing
I could not be yelping you could not be yelping she could not be yelping we could not be yelping you could not be yelping they could not be yelping
Perfect
I could not have yelped you could not have yelped she could not have yelped we could not have yelped you could not have yelped they could not have yelped
Perfect en V-ing
I could not have been yelping you could not have been yelping she could not have been yelping we could not have been yelping you could not have been yelping they could not have been yelping
Forme interrogative
Forme simple
could I yelp? could you yelp? could she yelp? could we yelp? could you yelp? could they yelp?
Forme en V-ing
could I be yelping? could you be yelping? could she be yelping? could we be yelping? could you be yelping? could they be yelping?
Perfect
could I have yelped? could you have yelped? could she have yelped? could we have yelped? could you have yelped? could they have yelped?
Perfect en V-ing
could I have been yelping? could you have been yelping? could she have been yelping? could we have been yelping? could you have been yelping? could they have been yelping?
Forme interro-négative
Forme simple
could I not yelp? could you not yelp? could she not yelp? could we not yelp? could you not yelp? could they not yelp?
Forme en V-ing
could I not be yelping? could you not be yelping? could she not be yelping? could we not be yelping? could you not be yelping? could they not be yelping?
Perfect
could I not have yelped? could you not have yelped? could she not have yelped? could we not have yelped? could you not have yelped? could they not have yelped?
Perfect en V-ing
could I not have been yelping? could you not have been yelping? could she not have been yelping? could we not have been yelping? could you not have been yelping? could they not have been yelping?