could window
Verbe régulier : window - windowed- windowed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could window
you could window
she could window
we could window
you could window
they could window 	I could be windowing
you could be windowing
she could be windowing
we could be windowing
you could be windowing
they could be windowing	I could have windowed
you could have windowed
she could have windowed
we could have windowed
you could have windowed
they could have windowed	I could have been windowing
you could have been windowing
she could have been windowing
we could have been windowing
you could have been windowing
they could have been windowing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not window
you could not window
she could not window
we could not window
you could not window
they could not window 	I could not be windowing
you could not be windowing
she could not be windowing
we could not be windowing
you could not be windowing
they could not be windowing	I could not have windowed
you could not have windowed
she could not have windowed
we could not have windowed
you could not have windowed
they could not have windowed	I could not have been windowing
you could not have been windowing
she could not have been windowing
we could not have been windowing
you could not have been windowing
they could not have been windowing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I window?
could you window?
could she window?
could we window?
could you window?
could they window? 	could I be windowing?
could you be windowing?
could she be windowing?
could we be windowing?
could you be windowing?
could they be windowing? 	could I have windowed?
could you have windowed?
could she have windowed?
could we have windowed?
could you have windowed?
could they have windowed? 	could I have been windowing?
could you have been windowing?
could she have been windowing?
could we have been windowing?
could you have been windowing?
could they have been windowing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not window?
could you not window?
could she not window?
could we not window?
could you not window?
could they not window? 	could I not be windowing?
could you not be windowing?
could she not be windowing?
could we not be windowing?
could you not be windowing?
could they not be windowing? 	could I not have windowed?
could you not have windowed?
could she not have windowed?
could we not have windowed?
could you not have windowed?
could they not have windowed? 	could I not have been windowing?
could you not have been windowing?
could she not have been windowing?
could we not have been windowing?
could you not have been windowing?
could they not have been windowing?