can enlighten
Regular verb: enlighten - enlightened- enlightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can enlighten
you can enlighten
she can enlighten
we can enlighten
you can enlighten
they can enlighten 	I can be enlightening
you can be enlightening
she can be enlightening
we can be enlightening
you can be enlightening
they can be enlightening	I can have enlightened
you can have enlightened
she can have enlightened
we can have enlightened
you can have enlightened
they can have enlightened	I can have been enlightening
you can have been enlightening
she can have been enlightening
we can have been enlightening
you can have been enlightening
they can have been enlightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't enlighten
you can't enlighten
she can't enlighten
we can't enlighten
you can't enlighten
they can't enlighten 	I can't be enlightening
you can't be enlightening
she can't be enlightening
we can't be enlightening
you can't be enlightening
they can't be enlightening	I can't have enlightened
you can't have enlightened
she can't have enlightened
we can't have enlightened
you can't have enlightened
they can't have enlightened	I can't have been enlightening
you can't have been enlightening
she can't have been enlightening
we can't have been enlightening
you can't have been enlightening
they can't have been enlightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I enlighten?
can you enlighten?
can she enlighten?
can we enlighten?
can you enlighten?
can they enlighten? 	can I be enlightening?
can you be enlightening?
can she be enlightening?
can we be enlightening?
can you be enlightening?
can they be enlightening? 	can I have enlightened?
can you have enlightened?
can she have enlightened?
can we have enlightened?
can you have enlightened?
can they have enlightened? 	can I have been enlightening?
can you have been enlightening?
can she have been enlightening?
can we have been enlightening?
can you have been enlightening?
can they have been enlightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I enlighten?
can't you enlighten?
can't she enlighten?
can't we enlighten?
can't you enlighten?
can't they enlighten? 	can't I be enlightening?
can't you be enlightening?
can't she be enlightening?
can't we be enlightening?
can't you be enlightening?
can't they be enlightening? 	can't I have enlightened?
can't you have enlightened?
can't she have enlightened?
can't we have enlightened?
can't you have enlightened?
can't they have enlightened? 	can't I have been enlightening?
can't you have been enlightening?
can't she have been enlightening?
can't we have been enlightening?
can't you have been enlightening?
can't they have been enlightening?