English verb conjugation
MUST CORDUROY

Regular verb: corduroy - corduroyed - corduroyed

Affirmation

Simple form	V-ing form
I must corduroy you must corduroy she must corduroy we must corduroy you must corduroy they must corduroy	I must be corduroying you must be corduroying she must be corduroying we must be corduroying you must be corduroying they must be corduroying
Perfect	V-ing perfect
I must have corduroyed you must have corduroyed she must have corduroyed we must have corduroyed you must have corduroyed they must have corduroyed	I must have been corduroying you must have been corduroying she must have been corduroying we must have been corduroying you must have been corduroying they must have been corduroying

Negation

Simple form	V-ing form
I must not corduroy you must not corduroy she must not corduroy we must not corduroy you must not corduroy they must not corduroy	I must not be corduroying you must not be corduroying she must not be corduroying we must not be corduroying you must not be corduroying they must not be corduroying
Perfect	V-ing perfect
I must not have corduroyed you must not have corduroyed she must not have corduroyed we must not have corduroyed you must not have corduroyed they must not have corduroyed	I must not have been corduroying you must not have been corduroying she must not have been corduroying we must not have been corduroying you must not have been corduroying they must not have been corduroying

Interrogative form

Simple form	V-ing form
must I corduroy? must you corduroy? must she corduroy? must we corduroy? must you corduroy? must they corduroy?	must I be corduroying? must you be corduroying? must she be corduroying? must we be corduroying? must you be corduroying? must they be corduroying?
Perfect	V-ing perfect
must I have corduroyed? must you have corduroyed? must she have corduroyed? must we have corduroyed? must you have corduroyed? must they have corduroyed?	must I have been corduroying? must you have been corduroying? must she have been corduroying? must we have been corduroying? must you have been corduroying? must they have been corduroying?

Interro-negative form

Simple form	V-ing form
must I not corduroy? must you not corduroy? must she not corduroy? must we not corduroy? must you not corduroy? must they not corduroy?	must I not be corduroying? must you not be corduroying? must she not be corduroying? must we not be corduroying? must you not be corduroying? must they not be corduroying?
Perfect	V-ing perfect
must I not have corduroyed? must you not have corduroyed? must she not have corduroyed? must we not have corduroyed? must you not have corduroyed? must they not have corduroyed?	must I not have been corduroying? must you not have been corduroying? must she not have been corduroying? must we not have been corduroying? must you not have been corduroying? must they not have been corduroying?