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 could not outsparkle
you could not outsparkle
she could not outsparkle
we could not outsparkle
you could not outsparkle
they could not outsparkle 	I could not be outsparkling
you could not be outsparkling
she could not be outsparkling
we could not be outsparkling
you could not be outsparkling
they could not be outsparkling	I could not have outsparkled
you could not have outsparkled
she could not have outsparkled
we could not have outsparkled
you could not have outsparkled
they could not have outsparkled	I could not have been outsparkling
you could not have been outsparkling
she could not have been outsparkling
we could not have been outsparkling
you could not have been outsparkling
they could not 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 	
could I not outsparkle?
could you not outsparkle?
could she not outsparkle?
could we not outsparkle?
could you not outsparkle?
could they not outsparkle? 	could I not be outsparkling?
could you not be outsparkling?
could she not be outsparkling?
could we not be outsparkling?
could you not be outsparkling?
could they not be outsparkling? 	could I not have outsparkled?
could you not have outsparkled?
could she not have outsparkled?
could we not have outsparkled?
could you not have outsparkled?
could they not have outsparkled? 	could I not have been outsparkling?
could you not have been outsparkling?
could she not have been outsparkling?
could we not have been outsparkling?
could you not have been outsparkling?
could they not have been outsparkling?