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
he could window
we could window
you could window
they could window 	I could be windowing
you could be windowing
he could be windowing
we could be windowing
you could be windowing
they could be windowing	I could have windowed
you could have windowed
he 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
he 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 couldn't window
you couldn't window
he couldn't window
we couldn't window
you couldn't window
they couldn't window 	I couldn't be windowing
you couldn't be windowing
he couldn't be windowing
we couldn't be windowing
you couldn't be windowing
they couldn't be windowing	I couldn't have windowed
you couldn't have windowed
he couldn't have windowed
we couldn't have windowed
you couldn't have windowed
they couldn't have windowed	I couldn't have been windowing
you couldn't have been windowing
he couldn't have been windowing
we couldn't have been windowing
you couldn't have been windowing
they couldn't have been windowing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I window?
could you window?
could he window?
could we window?
could you window?
could they window? 	could I be windowing?
could you be windowing?
could he be windowing?
could we be windowing?
could you be windowing?
could they be windowing? 	could I have windowed?
could you have windowed?
could he 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 he 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 	
couldn't I window?
couldn't you window?
couldn't he window?
couldn't we window?
couldn't you window?
couldn't they window? 	couldn't I be windowing?
couldn't you be windowing?
couldn't he be windowing?
couldn't we be windowing?
couldn't you be windowing?
couldn't they be windowing? 	couldn't I have windowed?
couldn't you have windowed?
couldn't he have windowed?
couldn't we have windowed?
couldn't you have windowed?
couldn't they have windowed? 	couldn't I have been windowing?
couldn't you have been windowing?
couldn't he have been windowing?
couldn't we have been windowing?
couldn't you have been windowing?
couldn't they have been windowing?