can duplicate
Regular verb: duplicate - duplicated- duplicated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can duplicate
you can duplicate
she can duplicate
we can duplicate
you can duplicate
they can duplicate 	I can be duplicating
you can be duplicating
she can be duplicating
we can be duplicating
you can be duplicating
they can be duplicating	I can have duplicated
you can have duplicated
she can have duplicated
we can have duplicated
you can have duplicated
they can have duplicated	I can have been duplicating
you can have been duplicating
she can have been duplicating
we can have been duplicating
you can have been duplicating
they can have been duplicating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't duplicate
you can't duplicate
she can't duplicate
we can't duplicate
you can't duplicate
they can't duplicate 	I can't be duplicating
you can't be duplicating
she can't be duplicating
we can't be duplicating
you can't be duplicating
they can't be duplicating	I can't have duplicated
you can't have duplicated
she can't have duplicated
we can't have duplicated
you can't have duplicated
they can't have duplicated	I can't have been duplicating
you can't have been duplicating
she can't have been duplicating
we can't have been duplicating
you can't have been duplicating
they can't have been duplicating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I duplicate?
can you duplicate?
can she duplicate?
can we duplicate?
can you duplicate?
can they duplicate? 	can I be duplicating?
can you be duplicating?
can she be duplicating?
can we be duplicating?
can you be duplicating?
can they be duplicating? 	can I have duplicated?
can you have duplicated?
can she have duplicated?
can we have duplicated?
can you have duplicated?
can they have duplicated? 	can I have been duplicating?
can you have been duplicating?
can she have been duplicating?
can we have been duplicating?
can you have been duplicating?
can they have been duplicating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I duplicate?
can't you duplicate?
can't she duplicate?
can't we duplicate?
can't you duplicate?
can't they duplicate? 	can't I be duplicating?
can't you be duplicating?
can't she be duplicating?
can't we be duplicating?
can't you be duplicating?
can't they be duplicating? 	can't I have duplicated?
can't you have duplicated?
can't she have duplicated?
can't we have duplicated?
can't you have duplicated?
can't they have duplicated? 	can't I have been duplicating?
can't you have been duplicating?
can't she have been duplicating?
can't we have been duplicating?
can't you have been duplicating?
can't they have been duplicating?