I can birl you can birl she can birl we can birl you can birl they can birl
Forma con V-ing
I can be birling you can be birling she can be birling we can be birling you can be birling they can be birling
Perfecto
I can have birled you can have birled she can have birled we can have birled you can have birled they can have birled
Perfecto con V-ing
I can have been birling you can have been birling she can have been birling we can have been birling you can have been birling they can have been birling
Negación
Forma simple
I cannot birl you cannot birl she cannot birl we cannot birl you cannot birl they cannot birl
Forma con V-ing
I cannot be birling you cannot be birling she cannot be birling we cannot be birling you cannot be birling they cannot be birling
Perfecto
I cannot have birled you cannot have birled she cannot have birled we cannot have birled you cannot have birled they cannot have birled
Perfecto con V-ing
I cannot have been birling you cannot have been birling she cannot have been birling we cannot have been birling you cannot have been birling they cannot have been birling
Forma interrogativa
Forma simple
can I birl? can you birl? can she birl? can we birl? can you birl? can they birl?
Forma con V-ing
can I be birling? can you be birling? can she be birling? can we be birling? can you be birling? can they be birling?
Perfecto
can I have birled? can you have birled? can she have birled? can we have birled? can you have birled? can they have birled?
Perfecto con V-ing
can I have been birling? can you have been birling? can she have been birling? can we have been birling? can you have been birling? can they have been birling?
Forma interro-negativa
Forma simple
can I not birl? can you not birl? can she not birl? can we not birl? can you not birl? can they not birl?
Forma con V-ing
can I not be birling? can you not be birling? can she not be birling? can we not be birling? can you not be birling? can they not be birling?
Perfecto
can I not have birled? can you not have birled? can she not have birled? can we not have birled? can you not have birled? can they not have birled?
Perfecto con V-ing
can I not have been birling? can you not have been birling? can she not have been birling? can we not have been birling? can you not have been birling? can they not have been birling?