English verb conjugation
MUST DEMUR

Regular verb: demur - demurred - demurred

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I mustn't demur you mustn't demur he mustn't demur we mustn't demur you mustn't demur they mustn't demur	I mustn't be demurring you mustn't be demurring he mustn't be demurring we mustn't be demurring you mustn't be demurring they mustn't be demurring
Perfect	V-ing perfect
I mustn't have demurred you mustn't have demurred he mustn't have demurred we mustn't have demurred you mustn't have demurred they mustn't have demurred	I mustn't have been demurring you mustn't have been demurring he mustn't have been demurring we mustn't have been demurring you mustn't have been demurring they mustn't have been demurring

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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
mustn't I demur? mustn't you demur? mustn't he demur? mustn't we demur? mustn't you demur? mustn't they demur?	mustn't I be demurring? mustn't you be demurring? mustn't he be demurring? mustn't we be demurring? mustn't you be demurring? mustn't they be demurring?
Perfect	V-ing perfect
mustn't I have demurred? mustn't you have demurred? mustn't he have demurred? mustn't we have demurred? mustn't you have demurred? mustn't they have demurred?	mustn't I have been demurring? mustn't you have been demurring? mustn't he have been demurring? mustn't we have been demurring? mustn't you have been demurring? mustn't they have been demurring?