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