must demur
Regular verb: demur - demurred- demurred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must demur
you must demur
he must demur
we must demur
you must demur
they must demur 	I must be demurring
you must be demurring
he must be demurring
we must be demurring
you must be demurring
they must be demurring	I must have demurred
you must have demurred
he must have demurred
we must have demurred
you must have demurred
they must have demurred	I must have been demurring
you must have been demurring
he must have been demurring
we must have been demurring
you must have been demurring
they must have been demurring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not demur
you must not demur
he must not demur
we must not demur
you must not demur
they must not demur 	I must not be demurring
you must not be demurring
he must not be demurring
we must not be demurring
you must not be demurring
they must not be demurring	I must not have demurred
you must not have demurred
he must not have demurred
we must not have demurred
you must not have demurred
they must not have demurred	I must not have been demurring
you must not have been demurring
he must not have been demurring
we must not have been demurring
you must not have been demurring
they must not have been demurring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I demur?
must you demur?
must he demur?
must we demur?
must you demur?
must they demur? 	must I be demurring?
must you be demurring?
must he be demurring?
must we be demurring?
must you be demurring?
must they be demurring? 	must I have demurred?
must you have demurred?
must he have demurred?
must we have demurred?
must you have demurred?
must they have demurred? 	must I have been demurring?
must you have been demurring?
must he have been demurring?
must we have been demurring?
must you have been demurring?
must they have been demurring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not demur?
must you not demur?
must he not demur?
must we not demur?
must you not demur?
must they not demur? 	must I not be demurring?
must you not be demurring?
must he not be demurring?
must we not be demurring?
must you not be demurring?
must they not be demurring? 	must I not have demurred?
must you not have demurred?
must he not have demurred?
must we not have demurred?
must you not have demurred?
must they not have demurred? 	must I not have been demurring?
must you not have been demurring?
must he not have been demurring?
must we not have been demurring?
must you not have been demurring?
must they not have been demurring?