could outsparkle
Regular verb: outsparkle - outsparkled- outsparkled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could outsparkle
you could outsparkle
she could outsparkle
we could outsparkle
you could outsparkle
they could outsparkle 	I could be outsparkling
you could be outsparkling
she could be outsparkling
we could be outsparkling
you could be outsparkling
they could be outsparkling	I could have outsparkled
you could have outsparkled
she could have outsparkled
we could have outsparkled
you could have outsparkled
they could have outsparkled	I could have been outsparkling
you could have been outsparkling
she could have been outsparkling
we could have been outsparkling
you could have been outsparkling
they could have been outsparkling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't outsparkle
you couldn't outsparkle
she couldn't outsparkle
we couldn't outsparkle
you couldn't outsparkle
they couldn't outsparkle 	I couldn't be outsparkling
you couldn't be outsparkling
she couldn't be outsparkling
we couldn't be outsparkling
you couldn't be outsparkling
they couldn't be outsparkling	I couldn't have outsparkled
you couldn't have outsparkled
she couldn't have outsparkled
we couldn't have outsparkled
you couldn't have outsparkled
they couldn't have outsparkled	I couldn't have been outsparkling
you couldn't have been outsparkling
she couldn't have been outsparkling
we couldn't have been outsparkling
you couldn't have been outsparkling
they couldn't have been outsparkling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I outsparkle?
could you outsparkle?
could she outsparkle?
could we outsparkle?
could you outsparkle?
could they outsparkle? 	could I be outsparkling?
could you be outsparkling?
could she be outsparkling?
could we be outsparkling?
could you be outsparkling?
could they be outsparkling? 	could I have outsparkled?
could you have outsparkled?
could she have outsparkled?
could we have outsparkled?
could you have outsparkled?
could they have outsparkled? 	could I have been outsparkling?
could you have been outsparkling?
could she have been outsparkling?
could we have been outsparkling?
could you have been outsparkling?
could they have been outsparkling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I outsparkle?
couldn't you outsparkle?
couldn't she outsparkle?
couldn't we outsparkle?
couldn't you outsparkle?
couldn't they outsparkle? 	couldn't I be outsparkling?
couldn't you be outsparkling?
couldn't she be outsparkling?
couldn't we be outsparkling?
couldn't you be outsparkling?
couldn't they be outsparkling? 	couldn't I have outsparkled?
couldn't you have outsparkled?
couldn't she have outsparkled?
couldn't we have outsparkled?
couldn't you have outsparkled?
couldn't they have outsparkled? 	couldn't I have been outsparkling?
couldn't you have been outsparkling?
couldn't she have been outsparkling?
couldn't we have been outsparkling?
couldn't you have been outsparkling?
couldn't they have been outsparkling?