could backlight
Irregular verb: backlight - backlit- backlit

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could backlight
you could backlight
she could backlight
we could backlight
you could backlight
they could backlight 	I could be backlighting
you could be backlighting
she could be backlighting
we could be backlighting
you could be backlighting
they could be backlighting	I could have backlit
you could have backlit
she could have backlit
we could have backlit
you could have backlit
they could have backlit	I could have been backlighting
you could have been backlighting
she could have been backlighting
we could have been backlighting
you could have been backlighting
they could have been backlighting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't backlight
you couldn't backlight
she couldn't backlight
we couldn't backlight
you couldn't backlight
they couldn't backlight 	I couldn't be backlighting
you couldn't be backlighting
she couldn't be backlighting
we couldn't be backlighting
you couldn't be backlighting
they couldn't be backlighting	I couldn't have backlit
you couldn't have backlit
she couldn't have backlit
we couldn't have backlit
you couldn't have backlit
they couldn't have backlit	I couldn't have been backlighting
you couldn't have been backlighting
she couldn't have been backlighting
we couldn't have been backlighting
you couldn't have been backlighting
they couldn't have been backlighting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I backlight?
could you backlight?
could she backlight?
could we backlight?
could you backlight?
could they backlight? 	could I be backlighting?
could you be backlighting?
could she be backlighting?
could we be backlighting?
could you be backlighting?
could they be backlighting? 	could I have backlit?
could you have backlit?
could she have backlit?
could we have backlit?
could you have backlit?
could they have backlit? 	could I have been backlighting?
could you have been backlighting?
could she have been backlighting?
could we have been backlighting?
could you have been backlighting?
could they have been backlighting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I backlight?
couldn't you backlight?
couldn't she backlight?
couldn't we backlight?
couldn't you backlight?
couldn't they backlight? 	couldn't I be backlighting?
couldn't you be backlighting?
couldn't she be backlighting?
couldn't we be backlighting?
couldn't you be backlighting?
couldn't they be backlighting? 	couldn't I have backlit?
couldn't you have backlit?
couldn't she have backlit?
couldn't we have backlit?
couldn't you have backlit?
couldn't they have backlit? 	couldn't I have been backlighting?
couldn't you have been backlighting?
couldn't she have been backlighting?
couldn't we have been backlighting?
couldn't you have been backlighting?
couldn't they have been backlighting?