I can scratch you can scratch he can scratch we can scratch you can scratch they can scratch
Forma com V-ing
I can be scratching you can be scratching he can be scratching we can be scratching you can be scratching they can be scratching
Perfeito
I can have scratched you can have scratched he can have scratched we can have scratched you can have scratched they can have scratched
Perfeito com V-ing
I can have been scratching you can have been scratching he can have been scratching we can have been scratching you can have been scratching they can have been scratching
Negação
Forma simple
I cannot scratch you cannot scratch he cannot scratch we cannot scratch you cannot scratch they cannot scratch
Forma com V-ing
I cannot be scratching you cannot be scratching he cannot be scratching we cannot be scratching you cannot be scratching they cannot be scratching
Perfeito
I cannot have scratched you cannot have scratched he cannot have scratched we cannot have scratched you cannot have scratched they cannot have scratched
Perfeito com V-ing
I cannot have been scratching you cannot have been scratching he cannot have been scratching we cannot have been scratching you cannot have been scratching they cannot have been scratching
Forma interrogativa
Forma simple
can I scratch? can you scratch? can he scratch? can we scratch? can you scratch? can they scratch?
Forma com V-ing
can I be scratching? can you be scratching? can he be scratching? can we be scratching? can you be scratching? can they be scratching?
Perfeito
can I have scratched? can you have scratched? can he have scratched? can we have scratched? can you have scratched? can they have scratched?
Perfeito com V-ing
can I have been scratching? can you have been scratching? can he have been scratching? can we have been scratching? can you have been scratching? can they have been scratching?
Forma interro-Negação
Forma simple
can I not scratch? can you not scratch? can he not scratch? can we not scratch? can you not scratch? can they not scratch?
Forma com V-ing
can I not be scratching? can you not be scratching? can he not be scratching? can we not be scratching? can you not be scratching? can they not be scratching?
Perfeito
can I not have scratched? can you not have scratched? can he not have scratched? can we not have scratched? can you not have scratched? can they not have scratched?
Perfeito com V-ing
can I not have been scratching? can you not have been scratching? can he not have been scratching? can we not have been scratching? can you not have been scratching? can they not have been scratching?