can huff
Regular verb: huff - huffed- huffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can huff
you can huff
she can huff
we can huff
you can huff
they can huff 	I can be huffing
you can be huffing
she can be huffing
we can be huffing
you can be huffing
they can be huffing	I can have huffed
you can have huffed
she can have huffed
we can have huffed
you can have huffed
they can have huffed	I can have been huffing
you can have been huffing
she can have been huffing
we can have been huffing
you can have been huffing
they can have been huffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't huff
you can't huff
she can't huff
we can't huff
you can't huff
they can't huff 	I can't be huffing
you can't be huffing
she can't be huffing
we can't be huffing
you can't be huffing
they can't be huffing	I can't have huffed
you can't have huffed
she can't have huffed
we can't have huffed
you can't have huffed
they can't have huffed	I can't have been huffing
you can't have been huffing
she can't have been huffing
we can't have been huffing
you can't have been huffing
they can't have been huffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I huff?
can you huff?
can she huff?
can we huff?
can you huff?
can they huff? 	can I be huffing?
can you be huffing?
can she be huffing?
can we be huffing?
can you be huffing?
can they be huffing? 	can I have huffed?
can you have huffed?
can she have huffed?
can we have huffed?
can you have huffed?
can they have huffed? 	can I have been huffing?
can you have been huffing?
can she have been huffing?
can we have been huffing?
can you have been huffing?
can they have been huffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I huff?
can't you huff?
can't she huff?
can't we huff?
can't you huff?
can't they huff? 	can't I be huffing?
can't you be huffing?
can't she be huffing?
can't we be huffing?
can't you be huffing?
can't they be huffing? 	can't I have huffed?
can't you have huffed?
can't she have huffed?
can't we have huffed?
can't you have huffed?
can't they have huffed? 	can't I have been huffing?
can't you have been huffing?
can't she have been huffing?
can't we have been huffing?
can't you have been huffing?
can't they have been huffing?