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