could window-dress
Regular verb: window-dress - window-dressed- window-dressed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could window-dress
you could window-dress
he could window-dress
we could window-dress
you could window-dress
they could window-dress 	I could be window-dressing
you could be window-dressing
he could be window-dressing
we could be window-dressing
you could be window-dressing
they could be window-dressing	I could have window-dressed
you could have window-dressed
he could have window-dressed
we could have window-dressed
you could have window-dressed
they could have window-dressed	I could have been window-dressing
you could have been window-dressing
he could have been window-dressing
we could have been window-dressing
you could have been window-dressing
they could have been window-dressing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not window-dress
you could not window-dress
he could not window-dress
we could not window-dress
you could not window-dress
they could not window-dress 	I could not be window-dressing
you could not be window-dressing
he could not be window-dressing
we could not be window-dressing
you could not be window-dressing
they could not be window-dressing	I could not have window-dressed
you could not have window-dressed
he could not have window-dressed
we could not have window-dressed
you could not have window-dressed
they could not have window-dressed	I could not have been window-dressing
you could not have been window-dressing
he could not have been window-dressing
we could not have been window-dressing
you could not have been window-dressing
they could not have been window-dressing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I window-dress?
could you window-dress?
could he window-dress?
could we window-dress?
could you window-dress?
could they window-dress? 	could I be window-dressing?
could you be window-dressing?
could he be window-dressing?
could we be window-dressing?
could you be window-dressing?
could they be window-dressing? 	could I have window-dressed?
could you have window-dressed?
could he have window-dressed?
could we have window-dressed?
could you have window-dressed?
could they have window-dressed? 	could I have been window-dressing?
could you have been window-dressing?
could he have been window-dressing?
could we have been window-dressing?
could you have been window-dressing?
could they have been window-dressing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not window-dress?
could you not window-dress?
could he not window-dress?
could we not window-dress?
could you not window-dress?
could they not window-dress? 	could I not be window-dressing?
could you not be window-dressing?
could he not be window-dressing?
could we not be window-dressing?
could you not be window-dressing?
could they not be window-dressing? 	could I not have window-dressed?
could you not have window-dressed?
could he not have window-dressed?
could we not have window-dressed?
could you not have window-dressed?
could they not have window-dressed? 	could I not have been window-dressing?
could you not have been window-dressing?
could he not have been window-dressing?
could we not have been window-dressing?
could you not have been window-dressing?
could they not have been window-dressing?