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 can't switch you can't switch he can't switch we can't switch you can't switch they can't switch
Forma com V-ing
I can't be switching you can't be switching he can't be switching we can't be switching you can't be switching they can't be switching
Perfeito
I can't have switched you can't have switched he can't have switched we can't have switched you can't have switched they can't have switched
Perfeito com V-ing
I can't have been switching you can't have been switching he can't have been switching we can't have been switching you can't have been switching they can't 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't I switch? can't you switch? can't he switch? can't we switch? can't you switch? can't they switch?
Forma com V-ing
can't I be switching? can't you be switching? can't he be switching? can't we be switching? can't you be switching? can't they be switching?
Perfeito
can't I have switched? can't you have switched? can't he have switched? can't we have switched? can't you have switched? can't they have switched?
Perfeito com V-ing
can't I have been switching? can't you have been switching? can't he have been switching? can't we have been switching? can't you have been switching? can't they have been switching?