can headbutt
Regular verb: headbutt - headbutted- headbutted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can headbutt
you can headbutt
he can headbutt
we can headbutt
you can headbutt
they can headbutt 	I can be headbutting
you can be headbutting
he can be headbutting
we can be headbutting
you can be headbutting
they can be headbutting	I can have headbutted
you can have headbutted
he can have headbutted
we can have headbutted
you can have headbutted
they can have headbutted	I can have been headbutting
you can have been headbutting
he can have been headbutting
we can have been headbutting
you can have been headbutting
they can have been headbutting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't headbutt
you can't headbutt
he can't headbutt
we can't headbutt
you can't headbutt
they can't headbutt 	I can't be headbutting
you can't be headbutting
he can't be headbutting
we can't be headbutting
you can't be headbutting
they can't be headbutting	I can't have headbutted
you can't have headbutted
he can't have headbutted
we can't have headbutted
you can't have headbutted
they can't have headbutted	I can't have been headbutting
you can't have been headbutting
he can't have been headbutting
we can't have been headbutting
you can't have been headbutting
they can't have been headbutting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I headbutt?
can you headbutt?
can he headbutt?
can we headbutt?
can you headbutt?
can they headbutt? 	can I be headbutting?
can you be headbutting?
can he be headbutting?
can we be headbutting?
can you be headbutting?
can they be headbutting? 	can I have headbutted?
can you have headbutted?
can he have headbutted?
can we have headbutted?
can you have headbutted?
can they have headbutted? 	can I have been headbutting?
can you have been headbutting?
can he have been headbutting?
can we have been headbutting?
can you have been headbutting?
can they have been headbutting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I headbutt?
can't you headbutt?
can't he headbutt?
can't we headbutt?
can't you headbutt?
can't they headbutt? 	can't I be headbutting?
can't you be headbutting?
can't he be headbutting?
can't we be headbutting?
can't you be headbutting?
can't they be headbutting? 	can't I have headbutted?
can't you have headbutted?
can't he have headbutted?
can't we have headbutted?
can't you have headbutted?
can't they have headbutted? 	can't I have been headbutting?
can't you have been headbutting?
can't he have been headbutting?
can't we have been headbutting?
can't you have been headbutting?
can't they have been headbutting?