I can switch you can switch he can switch we can switch you can switch they can switch
Forma com V-ing
I can be switching you can be switching he can be switching we can be switching you can be switching they can be switching
Perfeito
I can have switched you can have switched he can have switched we can have switched you can have switched they can have switched
Perfeito com V-ing
I can have been switching you can have been switching he can have been switching we can have been switching you can have been switching they can have been switching
Negação
Forma simple
I cannot switch you cannot switch he cannot switch we cannot switch you cannot switch they cannot switch
Forma com V-ing
I cannot be switching you cannot be switching he cannot be switching we cannot be switching you cannot be switching they cannot be switching
Perfeito
I cannot have switched you cannot have switched he cannot have switched we cannot have switched you cannot have switched they cannot have switched
Perfeito com V-ing
I cannot have been switching you cannot have been switching he cannot have been switching we cannot have been switching you cannot have been switching they cannot have been switching
Forma interrogativa
Forma simple
can I switch? can you switch? can he switch? can we switch? can you switch? can they switch?
Forma com V-ing
can I be switching? can you be switching? can he be switching? can we be switching? can you be switching? can they be switching?
Perfeito
can I have switched? can you have switched? can he have switched? can we have switched? can you have switched? can they have switched?
Perfeito com V-ing
can I have been switching? can you have been switching? can he have been switching? can we have been switching? can you have been switching? can they have been switching?
Forma interro-Negação
Forma simple
can I not switch? can you not switch? can he not switch? can we not switch? can you not switch? can they not switch?
Forma com V-ing
can I not be switching? can you not be switching? can he not be switching? can we not be switching? can you not be switching? can they not be switching?
Perfeito
can I not have switched? can you not have switched? can he not have switched? can we not have switched? can you not have switched? can they not have switched?
Perfeito com V-ing
can I not have been switching? can you not have been switching? can he not have been switching? can we not have been switching? can you not have been switching? can they not have been switching?