can shadowbox
Regular verb: shadowbox - shadowboxed- shadowboxed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can shadowbox
you can shadowbox
she can shadowbox
we can shadowbox
you can shadowbox
they can shadowbox 	I can be shadowboxing
you can be shadowboxing
she can be shadowboxing
we can be shadowboxing
you can be shadowboxing
they can be shadowboxing	I can have shadowboxed
you can have shadowboxed
she can have shadowboxed
we can have shadowboxed
you can have shadowboxed
they can have shadowboxed	I can have been shadowboxing
you can have been shadowboxing
she can have been shadowboxing
we can have been shadowboxing
you can have been shadowboxing
they can have been shadowboxing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't shadowbox
you can't shadowbox
she can't shadowbox
we can't shadowbox
you can't shadowbox
they can't shadowbox 	I can't be shadowboxing
you can't be shadowboxing
she can't be shadowboxing
we can't be shadowboxing
you can't be shadowboxing
they can't be shadowboxing	I can't have shadowboxed
you can't have shadowboxed
she can't have shadowboxed
we can't have shadowboxed
you can't have shadowboxed
they can't have shadowboxed	I can't have been shadowboxing
you can't have been shadowboxing
she can't have been shadowboxing
we can't have been shadowboxing
you can't have been shadowboxing
they can't have been shadowboxing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I shadowbox?
can you shadowbox?
can she shadowbox?
can we shadowbox?
can you shadowbox?
can they shadowbox? 	can I be shadowboxing?
can you be shadowboxing?
can she be shadowboxing?
can we be shadowboxing?
can you be shadowboxing?
can they be shadowboxing? 	can I have shadowboxed?
can you have shadowboxed?
can she have shadowboxed?
can we have shadowboxed?
can you have shadowboxed?
can they have shadowboxed? 	can I have been shadowboxing?
can you have been shadowboxing?
can she have been shadowboxing?
can we have been shadowboxing?
can you have been shadowboxing?
can they have been shadowboxing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I shadowbox?
can't you shadowbox?
can't she shadowbox?
can't we shadowbox?
can't you shadowbox?
can't they shadowbox? 	can't I be shadowboxing?
can't you be shadowboxing?
can't she be shadowboxing?
can't we be shadowboxing?
can't you be shadowboxing?
can't they be shadowboxing? 	can't I have shadowboxed?
can't you have shadowboxed?
can't she have shadowboxed?
can't we have shadowboxed?
can't you have shadowboxed?
can't they have shadowboxed? 	can't I have been shadowboxing?
can't you have been shadowboxing?
can't she have been shadowboxing?
can't we have been shadowboxing?
can't you have been shadowboxing?
can't they have been shadowboxing?