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 cannot goof
you cannot goof
she cannot goof
we cannot goof
you cannot goof
they cannot goof 	I cannot be goofing
you cannot be goofing
she cannot be goofing
we cannot be goofing
you cannot be goofing
they cannot be goofing	I cannot have goofed
you cannot have goofed
she cannot have goofed
we cannot have goofed
you cannot have goofed
they cannot have goofed	I cannot have been goofing
you cannot have been goofing
she cannot have been goofing
we cannot have been goofing
you cannot have been goofing
they cannot 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 I not goof?
can you not goof?
can she not goof?
can we not goof?
can you not goof?
can they not goof? 	can I not be goofing?
can you not be goofing?
can she not be goofing?
can we not be goofing?
can you not be goofing?
can they not be goofing? 	can I not have goofed?
can you not have goofed?
can she not have goofed?
can we not have goofed?
can you not have goofed?
can they not have goofed? 	can I not have been goofing?
can you not have been goofing?
can she not have been goofing?
can we not have been goofing?
can you not have been goofing?
can they not have been goofing?