can goof
Regular verb: goof - goofed- goofed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can goof
you can goof
she can goof
we can goof
you can goof
they can goof 	I can be goofing
you can be goofing
she can be goofing
we can be goofing
you can be goofing
they can be goofing	I can have goofed
you can have goofed
she can have goofed
we can have goofed
you can have goofed
they can have goofed	I can have been goofing
you can have been goofing
she can have been goofing
we can have been goofing
you can have been goofing
they can have been goofing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't goof
you can't goof
she can't goof
we can't goof
you can't goof
they can't goof 	I can't be goofing
you can't be goofing
she can't be goofing
we can't be goofing
you can't be goofing
they can't be goofing	I can't have goofed
you can't have goofed
she can't have goofed
we can't have goofed
you can't have goofed
they can't have goofed	I can't have been goofing
you can't have been goofing
she can't have been goofing
we can't have been goofing
you can't have been goofing
they can't have been goofing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I goof?
can you goof?
can she goof?
can we goof?
can you goof?
can they goof? 	can I be goofing?
can you be goofing?
can she be goofing?
can we be goofing?
can you be goofing?
can they be goofing? 	can I have goofed?
can you have goofed?
can she have goofed?
can we have goofed?
can you have goofed?
can they have goofed? 	can I have been goofing?
can you have been goofing?
can she have been goofing?
can we have been goofing?
can you have been goofing?
can they have been goofing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I goof?
can't you goof?
can't she goof?
can't we goof?
can't you goof?
can't they goof? 	can't I be goofing?
can't you be goofing?
can't she be goofing?
can't we be goofing?
can't you be goofing?
can't they be goofing? 	can't I have goofed?
can't you have goofed?
can't she have goofed?
can't we have goofed?
can't you have goofed?
can't they have goofed? 	can't I have been goofing?
can't you have been goofing?
can't she have been goofing?
can't we have been goofing?
can't you have been goofing?
can't they have been goofing?