can supplement
Regular verb: supplement - supplemented- supplemented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can supplement
you can supplement
she can supplement
we can supplement
you can supplement
they can supplement 	I can be supplementing
you can be supplementing
she can be supplementing
we can be supplementing
you can be supplementing
they can be supplementing	I can have supplemented
you can have supplemented
she can have supplemented
we can have supplemented
you can have supplemented
they can have supplemented	I can have been supplementing
you can have been supplementing
she can have been supplementing
we can have been supplementing
you can have been supplementing
they can have been supplementing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't supplement
you can't supplement
she can't supplement
we can't supplement
you can't supplement
they can't supplement 	I can't be supplementing
you can't be supplementing
she can't be supplementing
we can't be supplementing
you can't be supplementing
they can't be supplementing	I can't have supplemented
you can't have supplemented
she can't have supplemented
we can't have supplemented
you can't have supplemented
they can't have supplemented	I can't have been supplementing
you can't have been supplementing
she can't have been supplementing
we can't have been supplementing
you can't have been supplementing
they can't have been supplementing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I supplement?
can you supplement?
can she supplement?
can we supplement?
can you supplement?
can they supplement? 	can I be supplementing?
can you be supplementing?
can she be supplementing?
can we be supplementing?
can you be supplementing?
can they be supplementing? 	can I have supplemented?
can you have supplemented?
can she have supplemented?
can we have supplemented?
can you have supplemented?
can they have supplemented? 	can I have been supplementing?
can you have been supplementing?
can she have been supplementing?
can we have been supplementing?
can you have been supplementing?
can they have been supplementing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I supplement?
can't you supplement?
can't she supplement?
can't we supplement?
can't you supplement?
can't they supplement? 	can't I be supplementing?
can't you be supplementing?
can't she be supplementing?
can't we be supplementing?
can't you be supplementing?
can't they be supplementing? 	can't I have supplemented?
can't you have supplemented?
can't she have supplemented?
can't we have supplemented?
can't you have supplemented?
can't they have supplemented? 	can't I have been supplementing?
can't you have been supplementing?
can't she have been supplementing?
can't we have been supplementing?
can't you have been supplementing?
can't they have been supplementing?