I could yelp you could yelp he could yelp we could yelp you could yelp they could yelp
Forma com 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
Perfeito
I could have yelped you could have yelped he could have yelped we could have yelped you could have yelped they could have yelped
Perfeito com 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
Negação
Forma 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
Forma com 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
Perfeito
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
Perfeito com 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
Forma interrogativa
Forma simple
could I yelp? could you yelp? could he yelp? could we yelp? could you yelp? could they yelp?
Forma com 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?
Perfeito
could I have yelped? could you have yelped? could he have yelped? could we have yelped? could you have yelped? could they have yelped?
Perfeito com 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?
Forma interro-Negação
Forma 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?
Forma com 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?
Perfeito
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?
Perfeito com 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?