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