I must abut you must abut she must abut we must abut you must abut they must abut
V-ing form
I must be abuting you must be abuting she must be abuting we must be abuting you must be abuting they must be abuting
Perfect
I must have abuted you must have abuted she 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 she must have been abuting we must have been abuting you must have been abuting they must have been abuting
Negation
Simple form
I must not abut you must not abut she must not abut we must not abut you must not abut they must not abut
V-ing form
I must not be abuting you must not be abuting she must not be abuting we must not be abuting you must not be abuting they must not be abuting
Perfect
I must not have abuted you must not have abuted she must not have abuted we must not have abuted you must not have abuted they must not have abuted
V-ing perfect
I must not have been abuting you must not have been abuting she must not have been abuting we must not have been abuting you must not have been abuting they must not have been abuting
Interrogative form
Simple form
must I abut? must you abut? must she abut? must we abut? must you abut? must they abut?
V-ing form
must I be abuting? must you be abuting? must she be abuting? must we be abuting? must you be abuting? must they be abuting?
Perfect
must I have abuted? must you have abuted? must she 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 she have been abuting? must we have been abuting? must you have been abuting? must they have been abuting?
Interro-negative form
Simple form
must I not abut? must you not abut? must she not abut? must we not abut? must you not abut? must they not abut?
V-ing form
must I not be abuting? must you not be abuting? must she not be abuting? must we not be abuting? must you not be abuting? must they not be abuting?
Perfect
must I not have abuted? must you not have abuted? must she not have abuted? must we not have abuted? must you not have abuted? must they not have abuted?
V-ing perfect
must I not have been abuting? must you not have been abuting? must she not have been abuting? must we not have been abuting? must you not have been abuting? must they not have been abuting?