could overshadow
Regular verb: overshadow - overshadowed- overshadowed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overshadow
you could overshadow
he could overshadow
we could overshadow
you could overshadow
they could overshadow 	I could be overshadowing
you could be overshadowing
he could be overshadowing
we could be overshadowing
you could be overshadowing
they could be overshadowing	I could have overshadowed
you could have overshadowed
he could have overshadowed
we could have overshadowed
you could have overshadowed
they could have overshadowed	I could have been overshadowing
you could have been overshadowing
he could have been overshadowing
we could have been overshadowing
you could have been overshadowing
they could have been overshadowing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't overshadow
you couldn't overshadow
he couldn't overshadow
we couldn't overshadow
you couldn't overshadow
they couldn't overshadow 	I couldn't be overshadowing
you couldn't be overshadowing
he couldn't be overshadowing
we couldn't be overshadowing
you couldn't be overshadowing
they couldn't be overshadowing	I couldn't have overshadowed
you couldn't have overshadowed
he couldn't have overshadowed
we couldn't have overshadowed
you couldn't have overshadowed
they couldn't have overshadowed	I couldn't have been overshadowing
you couldn't have been overshadowing
he couldn't have been overshadowing
we couldn't have been overshadowing
you couldn't have been overshadowing
they couldn't have been overshadowing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overshadow?
could you overshadow?
could he overshadow?
could we overshadow?
could you overshadow?
could they overshadow? 	could I be overshadowing?
could you be overshadowing?
could he be overshadowing?
could we be overshadowing?
could you be overshadowing?
could they be overshadowing? 	could I have overshadowed?
could you have overshadowed?
could he have overshadowed?
could we have overshadowed?
could you have overshadowed?
could they have overshadowed? 	could I have been overshadowing?
could you have been overshadowing?
could he have been overshadowing?
could we have been overshadowing?
could you have been overshadowing?
could they have been overshadowing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I overshadow?
couldn't you overshadow?
couldn't he overshadow?
couldn't we overshadow?
couldn't you overshadow?
couldn't they overshadow? 	couldn't I be overshadowing?
couldn't you be overshadowing?
couldn't he be overshadowing?
couldn't we be overshadowing?
couldn't you be overshadowing?
couldn't they be overshadowing? 	couldn't I have overshadowed?
couldn't you have overshadowed?
couldn't he have overshadowed?
couldn't we have overshadowed?
couldn't you have overshadowed?
couldn't they have overshadowed? 	couldn't I have been overshadowing?
couldn't you have been overshadowing?
couldn't he have been overshadowing?
couldn't we have been overshadowing?
couldn't you have been overshadowing?
couldn't they have been overshadowing?