could coruscate
Regular verb: coruscate - coruscated- coruscated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could coruscate
you could coruscate
she could coruscate
we could coruscate
you could coruscate
they could coruscate 	I could be coruscating
you could be coruscating
she could be coruscating
we could be coruscating
you could be coruscating
they could be coruscating	I could have coruscated
you could have coruscated
she could have coruscated
we could have coruscated
you could have coruscated
they could have coruscated	I could have been coruscating
you could have been coruscating
she could have been coruscating
we could have been coruscating
you could have been coruscating
they could have been coruscating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't coruscate
you couldn't coruscate
she couldn't coruscate
we couldn't coruscate
you couldn't coruscate
they couldn't coruscate 	I couldn't be coruscating
you couldn't be coruscating
she couldn't be coruscating
we couldn't be coruscating
you couldn't be coruscating
they couldn't be coruscating	I couldn't have coruscated
you couldn't have coruscated
she couldn't have coruscated
we couldn't have coruscated
you couldn't have coruscated
they couldn't have coruscated	I couldn't have been coruscating
you couldn't have been coruscating
she couldn't have been coruscating
we couldn't have been coruscating
you couldn't have been coruscating
they couldn't have been coruscating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I coruscate?
could you coruscate?
could she coruscate?
could we coruscate?
could you coruscate?
could they coruscate? 	could I be coruscating?
could you be coruscating?
could she be coruscating?
could we be coruscating?
could you be coruscating?
could they be coruscating? 	could I have coruscated?
could you have coruscated?
could she have coruscated?
could we have coruscated?
could you have coruscated?
could they have coruscated? 	could I have been coruscating?
could you have been coruscating?
could she have been coruscating?
could we have been coruscating?
could you have been coruscating?
could they have been coruscating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I coruscate?
couldn't you coruscate?
couldn't she coruscate?
couldn't we coruscate?
couldn't you coruscate?
couldn't they coruscate? 	couldn't I be coruscating?
couldn't you be coruscating?
couldn't she be coruscating?
couldn't we be coruscating?
couldn't you be coruscating?
couldn't they be coruscating? 	couldn't I have coruscated?
couldn't you have coruscated?
couldn't she have coruscated?
couldn't we have coruscated?
couldn't you have coruscated?
couldn't they have coruscated? 	couldn't I have been coruscating?
couldn't you have been coruscating?
couldn't she have been coruscating?
couldn't we have been coruscating?
couldn't you have been coruscating?
couldn't they have been coruscating?