can doff
Regular verb: doff - doffed- doffed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can doff
you can doff
she can doff
we can doff
you can doff
they can doff 	I can be doffing
you can be doffing
she can be doffing
we can be doffing
you can be doffing
they can be doffing	I can have doffed
you can have doffed
she can have doffed
we can have doffed
you can have doffed
they can have doffed	I can have been doffing
you can have been doffing
she can have been doffing
we can have been doffing
you can have been doffing
they can have been doffing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot doff
you cannot doff
she cannot doff
we cannot doff
you cannot doff
they cannot doff 	I cannot be doffing
you cannot be doffing
she cannot be doffing
we cannot be doffing
you cannot be doffing
they cannot be doffing	I cannot have doffed
you cannot have doffed
she cannot have doffed
we cannot have doffed
you cannot have doffed
they cannot have doffed	I cannot have been doffing
you cannot have been doffing
she cannot have been doffing
we cannot have been doffing
you cannot have been doffing
they cannot have been doffing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I doff?
can you doff?
can she doff?
can we doff?
can you doff?
can they doff? 	can I be doffing?
can you be doffing?
can she be doffing?
can we be doffing?
can you be doffing?
can they be doffing? 	can I have doffed?
can you have doffed?
can she have doffed?
can we have doffed?
can you have doffed?
can they have doffed? 	can I have been doffing?
can you have been doffing?
can she have been doffing?
can we have been doffing?
can you have been doffing?
can they have been doffing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not doff?
can you not doff?
can she not doff?
can we not doff?
can you not doff?
can they not doff? 	can I not be doffing?
can you not be doffing?
can she not be doffing?
can we not be doffing?
can you not be doffing?
can they not be doffing? 	can I not have doffed?
can you not have doffed?
can she not have doffed?
can we not have doffed?
can you not have doffed?
can they not have doffed? 	can I not have been doffing?
can you not have been doffing?
can she not have been doffing?
can we not have been doffing?
can you not have been doffing?
can they not have been doffing?