I could birl you could birl she could birl we could birl you could birl they could birl
Forme en V-ing
I could be birling you could be birling she could be birling we could be birling you could be birling they could be birling
Perfect
I could have birled you could have birled she could have birled we could have birled you could have birled they could have birled
Perfect en V-ing
I could have been birling you could have been birling she could have been birling we could have been birling you could have been birling they could have been birling
Négation
Forme simple
I couldn't birl you couldn't birl she couldn't birl we couldn't birl you couldn't birl they couldn't birl
Forme en V-ing
I couldn't be birling you couldn't be birling she couldn't be birling we couldn't be birling you couldn't be birling they couldn't be birling
Perfect
I couldn't have birled you couldn't have birled she couldn't have birled we couldn't have birled you couldn't have birled they couldn't have birled
Perfect en V-ing
I couldn't have been birling you couldn't have been birling she couldn't have been birling we couldn't have been birling you couldn't have been birling they couldn't have been birling
Forme interrogative
Forme simple
could I birl? could you birl? could she birl? could we birl? could you birl? could they birl?
Forme en V-ing
could I be birling? could you be birling? could she be birling? could we be birling? could you be birling? could they be birling?
Perfect
could I have birled? could you have birled? could she have birled? could we have birled? could you have birled? could they have birled?
Perfect en V-ing
could I have been birling? could you have been birling? could she have been birling? could we have been birling? could you have been birling? could they have been birling?
Forme interro-négative
Forme simple
couldn't I birl? couldn't you birl? couldn't she birl? couldn't we birl? couldn't you birl? couldn't they birl?
Forme en V-ing
couldn't I be birling? couldn't you be birling? couldn't she be birling? couldn't we be birling? couldn't you be birling? couldn't they be birling?
Perfect
couldn't I have birled? couldn't you have birled? couldn't she have birled? couldn't we have birled? couldn't you have birled? couldn't they have birled?
Perfect en V-ing
couldn't I have been birling? couldn't you have been birling? couldn't she have been birling? couldn't we have been birling? couldn't you have been birling? couldn't they have been birling?