English verb conjugation
MUST DRIFT

Regular verb: drift - drifted - drifted

Affirmation

Simple form	V-ing form
I must drift you must drift he must drift we must drift you must drift they must drift	I must be drifting you must be drifting he must be drifting we must be drifting you must be drifting they must be drifting
Perfect	V-ing perfect
I must have drifted you must have drifted he must have drifted we must have drifted you must have drifted they must have drifted	I must have been drifting you must have been drifting he must have been drifting we must have been drifting you must have been drifting they must have been drifting

Negation

Simple form	V-ing form
I mustn't drift you mustn't drift he mustn't drift we mustn't drift you mustn't drift they mustn't drift	I mustn't be drifting you mustn't be drifting he mustn't be drifting we mustn't be drifting you mustn't be drifting they mustn't be drifting
Perfect	V-ing perfect
I mustn't have drifted you mustn't have drifted he mustn't have drifted we mustn't have drifted you mustn't have drifted they mustn't have drifted	I mustn't have been drifting you mustn't have been drifting he mustn't have been drifting we mustn't have been drifting you mustn't have been drifting they mustn't have been drifting

Interrogative form

Simple form	V-ing form
must I drift? must you drift? must he drift? must we drift? must you drift? must they drift?	must I be drifting? must you be drifting? must he be drifting? must we be drifting? must you be drifting? must they be drifting?
Perfect	V-ing perfect
must I have drifted? must you have drifted? must he have drifted? must we have drifted? must you have drifted? must they have drifted?	must I have been drifting? must you have been drifting? must he have been drifting? must we have been drifting? must you have been drifting? must they have been drifting?

Interro-negative form

Simple form	V-ing form
mustn't I drift? mustn't you drift? mustn't he drift? mustn't we drift? mustn't you drift? mustn't they drift?	mustn't I be drifting? mustn't you be drifting? mustn't he be drifting? mustn't we be drifting? mustn't you be drifting? mustn't they be drifting?
Perfect	V-ing perfect
mustn't I have drifted? mustn't you have drifted? mustn't he have drifted? mustn't we have drifted? mustn't you have drifted? mustn't they have drifted?	mustn't I have been drifting? mustn't you have been drifting? mustn't he have been drifting? mustn't we have been drifting? mustn't you have been drifting? mustn't they have been drifting?