I must revolve you must revolve he must revolve we must revolve you must revolve they must revolve
V-ing form
I must be revolving you must be revolving he must be revolving we must be revolving you must be revolving they must be revolving
Perfect
I must have revolved you must have revolved he must have revolved we must have revolved you must have revolved they must have revolved
V-ing perfect
I must have been revolving you must have been revolving he must have been revolving we must have been revolving you must have been revolving they must have been revolving
Negation
Simple form
I mustn't revolve you mustn't revolve he mustn't revolve we mustn't revolve you mustn't revolve they mustn't revolve
V-ing form
I mustn't be revolving you mustn't be revolving he mustn't be revolving we mustn't be revolving you mustn't be revolving they mustn't be revolving
Perfect
I mustn't have revolved you mustn't have revolved he mustn't have revolved we mustn't have revolved you mustn't have revolved they mustn't have revolved
V-ing perfect
I mustn't have been revolving you mustn't have been revolving he mustn't have been revolving we mustn't have been revolving you mustn't have been revolving they mustn't have been revolving
Interrogative form
Simple form
must I revolve? must you revolve? must he revolve? must we revolve? must you revolve? must they revolve?
V-ing form
must I be revolving? must you be revolving? must he be revolving? must we be revolving? must you be revolving? must they be revolving?
Perfect
must I have revolved? must you have revolved? must he have revolved? must we have revolved? must you have revolved? must they have revolved?
V-ing perfect
must I have been revolving? must you have been revolving? must he have been revolving? must we have been revolving? must you have been revolving? must they have been revolving?
Interro-negative form
Simple form
mustn't I revolve? mustn't you revolve? mustn't he revolve? mustn't we revolve? mustn't you revolve? mustn't they revolve?
V-ing form
mustn't I be revolving? mustn't you be revolving? mustn't he be revolving? mustn't we be revolving? mustn't you be revolving? mustn't they be revolving?
Perfect
mustn't I have revolved? mustn't you have revolved? mustn't he have revolved? mustn't we have revolved? mustn't you have revolved? mustn't they have revolved?
V-ing perfect
mustn't I have been revolving? mustn't you have been revolving? mustn't he have been revolving? mustn't we have been revolving? mustn't you have been revolving? mustn't they have been revolving?