I must disdain you must disdain she must disdain we must disdain you must disdain they must disdain
V-ing form
I must be disdaining you must be disdaining she must be disdaining we must be disdaining you must be disdaining they must be disdaining
Perfect
I must have disdained you must have disdained she must have disdained we must have disdained you must have disdained they must have disdained
V-ing perfect
I must have been disdaining you must have been disdaining she must have been disdaining we must have been disdaining you must have been disdaining they must have been disdaining
Negation
Simple form
I mustn't disdain you mustn't disdain she mustn't disdain we mustn't disdain you mustn't disdain they mustn't disdain
V-ing form
I mustn't be disdaining you mustn't be disdaining she mustn't be disdaining we mustn't be disdaining you mustn't be disdaining they mustn't be disdaining
Perfect
I mustn't have disdained you mustn't have disdained she mustn't have disdained we mustn't have disdained you mustn't have disdained they mustn't have disdained
V-ing perfect
I mustn't have been disdaining you mustn't have been disdaining she mustn't have been disdaining we mustn't have been disdaining you mustn't have been disdaining they mustn't have been disdaining
Interrogative form
Simple form
must I disdain? must you disdain? must she disdain? must we disdain? must you disdain? must they disdain?
V-ing form
must I be disdaining? must you be disdaining? must she be disdaining? must we be disdaining? must you be disdaining? must they be disdaining?
Perfect
must I have disdained? must you have disdained? must she have disdained? must we have disdained? must you have disdained? must they have disdained?
V-ing perfect
must I have been disdaining? must you have been disdaining? must she have been disdaining? must we have been disdaining? must you have been disdaining? must they have been disdaining?
Interro-negative form
Simple form
mustn't I disdain? mustn't you disdain? mustn't she disdain? mustn't we disdain? mustn't you disdain? mustn't they disdain?
V-ing form
mustn't I be disdaining? mustn't you be disdaining? mustn't she be disdaining? mustn't we be disdaining? mustn't you be disdaining? mustn't they be disdaining?
Perfect
mustn't I have disdained? mustn't you have disdained? mustn't she have disdained? mustn't we have disdained? mustn't you have disdained? mustn't they have disdained?
V-ing perfect
mustn't I have been disdaining? mustn't you have been disdaining? mustn't she have been disdaining? mustn't we have been disdaining? mustn't you have been disdaining? mustn't they have been disdaining?