could switch
Verbo regular: switch - switched- switched

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could switch
you could switch
he could switch
we could switch
you could switch
they could switch 	I could be switching
you could be switching
he could be switching
we could be switching
you could be switching
they could be switching	I could have switched
you could have switched
he could have switched
we could have switched
you could have switched
they could have switched	I could have been switching
you could have been switching
he could have been switching
we could have been switching
you could have been switching
they could have been switching	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not switch
you could not switch
he could not switch
we could not switch
you could not switch
they could not switch 	I could not be switching
you could not be switching
he could not be switching
we could not be switching
you could not be switching
they could not be switching	I could not have switched
you could not have switched
he could not have switched
we could not have switched
you could not have switched
they could not have switched	I could not have been switching
you could not have been switching
he could not have been switching
we could not have been switching
you could not have been switching
they could not have been switching	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I switch?
could you switch?
could he switch?
could we switch?
could you switch?
could they switch? 	could I be switching?
could you be switching?
could he be switching?
could we be switching?
could you be switching?
could they be switching? 	could I have switched?
could you have switched?
could he have switched?
could we have switched?
could you have switched?
could they have switched? 	could I have been switching?
could you have been switching?
could he have been switching?
could we have been switching?
could you have been switching?
could they have been switching? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not switch?
could you not switch?
could he not switch?
could we not switch?
could you not switch?
could they not switch? 	could I not be switching?
could you not be switching?
could he not be switching?
could we not be switching?
could you not be switching?
could they not be switching? 	could I not have switched?
could you not have switched?
could he not have switched?
could we not have switched?
could you not have switched?
could they not have switched? 	could I not have been switching?
could you not have been switching?
could he not have been switching?
could we not have been switching?
could you not have been switching?
could they not have been switching?