I could yelp you could yelp he could yelp we could yelp you could yelp they could yelp
Forme en V-ing
I could be yelping you could be yelping he could be yelping we could be yelping you could be yelping they could be yelping
Perfect
I could have yelped you could have yelped he 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 he could have been yelping we could have been yelping you could have been yelping they could have been yelping
Négation
Forme simple
I couldn't yelp you couldn't yelp he couldn't yelp we couldn't yelp you couldn't yelp they couldn't yelp
Forme en V-ing
I couldn't be yelping you couldn't be yelping he couldn't be yelping we couldn't be yelping you couldn't be yelping they couldn't be yelping
Perfect
I couldn't have yelped you couldn't have yelped he couldn't have yelped we couldn't have yelped you couldn't have yelped they couldn't have yelped
Perfect en V-ing
I couldn't have been yelping you couldn't have been yelping he couldn't have been yelping we couldn't have been yelping you couldn't have been yelping they couldn't have been yelping
Forme interrogative
Forme simple
could I yelp? could you yelp? could he yelp? could we yelp? could you yelp? could they yelp?
Forme en V-ing
could I be yelping? could you be yelping? could he be yelping? could we be yelping? could you be yelping? could they be yelping?
Perfect
could I have yelped? could you have yelped? could he 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 he have been yelping? could we have been yelping? could you have been yelping? could they have been yelping?
Forme interro-négative
Forme simple
couldn't I yelp? couldn't you yelp? couldn't he yelp? couldn't we yelp? couldn't you yelp? couldn't they yelp?
Forme en V-ing
couldn't I be yelping? couldn't you be yelping? couldn't he be yelping? couldn't we be yelping? couldn't you be yelping? couldn't they be yelping?
Perfect
couldn't I have yelped? couldn't you have yelped? couldn't he have yelped? couldn't we have yelped? couldn't you have yelped? couldn't they have yelped?
Perfect en V-ing
couldn't I have been yelping? couldn't you have been yelping? couldn't he have been yelping? couldn't we have been yelping? couldn't you have been yelping? couldn't they have been yelping?