could switch
Verbe régulier : switch - switched- switched
Traduction française : changer de - changer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could switch
you could switch
she could switch
we could switch
you could switch
they could switch 	I could be switching
you could be switching
she could be switching
we could be switching
you could be switching
they could be switching	I could have switched
you could have switched
she 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
she could have been switching
we could have been switching
you could have been switching
they could have been switching	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't switch
you couldn't switch
she couldn't switch
we couldn't switch
you couldn't switch
they couldn't switch 	I couldn't be switching
you couldn't be switching
she couldn't be switching
we couldn't be switching
you couldn't be switching
they couldn't be switching	I couldn't have switched
you couldn't have switched
she couldn't have switched
we couldn't have switched
you couldn't have switched
they couldn't have switched	I couldn't have been switching
you couldn't have been switching
she couldn't have been switching
we couldn't have been switching
you couldn't have been switching
they couldn't have been switching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I switch?
could you switch?
could she switch?
could we switch?
could you switch?
could they switch? 	could I be switching?
could you be switching?
could she be switching?
could we be switching?
could you be switching?
could they be switching? 	could I have switched?
could you have switched?
could she 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 she have been switching?
could we have been switching?
could you have been switching?
could they have been switching? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I switch?
couldn't you switch?
couldn't she switch?
couldn't we switch?
couldn't you switch?
couldn't they switch? 	couldn't I be switching?
couldn't you be switching?
couldn't she be switching?
couldn't we be switching?
couldn't you be switching?
couldn't they be switching? 	couldn't I have switched?
couldn't you have switched?
couldn't she have switched?
couldn't we have switched?
couldn't you have switched?
couldn't they have switched? 	couldn't I have been switching?
couldn't you have been switching?
couldn't she have been switching?
couldn't we have been switching?
couldn't you have been switching?
couldn't they have been switching?