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 cannot huff
you cannot huff
she cannot huff
we cannot huff
you cannot huff
they cannot huff 	I cannot be huffing
you cannot be huffing
she cannot be huffing
we cannot be huffing
you cannot be huffing
they cannot be huffing	I cannot have huffed
you cannot have huffed
she cannot have huffed
we cannot have huffed
you cannot have huffed
they cannot have huffed	I cannot have been huffing
you cannot have been huffing
she cannot have been huffing
we cannot have been huffing
you cannot have been huffing
they cannot 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 I not huff?
can you not huff?
can she not huff?
can we not huff?
can you not huff?
can they not huff? 	can I not be huffing?
can you not be huffing?
can she not be huffing?
can we not be huffing?
can you not be huffing?
can they not be huffing? 	can I not have huffed?
can you not have huffed?
can she not have huffed?
can we not have huffed?
can you not have huffed?
can they not have huffed? 	can I not have been huffing?
can you not have been huffing?
can she not have been huffing?
can we not have been huffing?
can you not have been huffing?
can they not have been huffing?