could unveil
Regular verb: unveil - unveiled- unveiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could unveil
you could unveil
she could unveil
we could unveil
you could unveil
they could unveil 	I could be unveiling
you could be unveiling
she could be unveiling
we could be unveiling
you could be unveiling
they could be unveiling	I could have unveiled
you could have unveiled
she could have unveiled
we could have unveiled
you could have unveiled
they could have unveiled	I could have been unveiling
you could have been unveiling
she could have been unveiling
we could have been unveiling
you could have been unveiling
they could have been unveiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't unveil
you couldn't unveil
she couldn't unveil
we couldn't unveil
you couldn't unveil
they couldn't unveil 	I couldn't be unveiling
you couldn't be unveiling
she couldn't be unveiling
we couldn't be unveiling
you couldn't be unveiling
they couldn't be unveiling	I couldn't have unveiled
you couldn't have unveiled
she couldn't have unveiled
we couldn't have unveiled
you couldn't have unveiled
they couldn't have unveiled	I couldn't have been unveiling
you couldn't have been unveiling
she couldn't have been unveiling
we couldn't have been unveiling
you couldn't have been unveiling
they couldn't have been unveiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I unveil?
could you unveil?
could she unveil?
could we unveil?
could you unveil?
could they unveil? 	could I be unveiling?
could you be unveiling?
could she be unveiling?
could we be unveiling?
could you be unveiling?
could they be unveiling? 	could I have unveiled?
could you have unveiled?
could she have unveiled?
could we have unveiled?
could you have unveiled?
could they have unveiled? 	could I have been unveiling?
could you have been unveiling?
could she have been unveiling?
could we have been unveiling?
could you have been unveiling?
could they have been unveiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I unveil?
couldn't you unveil?
couldn't she unveil?
couldn't we unveil?
couldn't you unveil?
couldn't they unveil? 	couldn't I be unveiling?
couldn't you be unveiling?
couldn't she be unveiling?
couldn't we be unveiling?
couldn't you be unveiling?
couldn't they be unveiling? 	couldn't I have unveiled?
couldn't you have unveiled?
couldn't she have unveiled?
couldn't we have unveiled?
couldn't you have unveiled?
couldn't they have unveiled? 	couldn't I have been unveiling?
couldn't you have been unveiling?
couldn't she have been unveiling?
couldn't we have been unveiling?
couldn't you have been unveiling?
couldn't they have been unveiling?