could goof
Regular verb: goof - goofed- goofed

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

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

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

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