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