English verb conjugation
MUST STALK

Regular verb: stalk - stalked - stalked

Affirmation

Simple form	V-ing form
I must stalk you must stalk he must stalk we must stalk you must stalk they must stalk	I must be stalking you must be stalking he must be stalking we must be stalking you must be stalking they must be stalking
Perfect	V-ing perfect
I must have stalked you must have stalked he must have stalked we must have stalked you must have stalked they must have stalked	I must have been stalking you must have been stalking he must have been stalking we must have been stalking you must have been stalking they must have been stalking

Negation

Simple form	V-ing form
I mustn't stalk you mustn't stalk he mustn't stalk we mustn't stalk you mustn't stalk they mustn't stalk	I mustn't be stalking you mustn't be stalking he mustn't be stalking we mustn't be stalking you mustn't be stalking they mustn't be stalking
Perfect	V-ing perfect
I mustn't have stalked you mustn't have stalked he mustn't have stalked we mustn't have stalked you mustn't have stalked they mustn't have stalked	I mustn't have been stalking you mustn't have been stalking he mustn't have been stalking we mustn't have been stalking you mustn't have been stalking they mustn't have been stalking

Interrogative form

Simple form	V-ing form
must I stalk? must you stalk? must he stalk? must we stalk? must you stalk? must they stalk?	must I be stalking? must you be stalking? must he be stalking? must we be stalking? must you be stalking? must they be stalking?
Perfect	V-ing perfect
must I have stalked? must you have stalked? must he have stalked? must we have stalked? must you have stalked? must they have stalked?	must I have been stalking? must you have been stalking? must he have been stalking? must we have been stalking? must you have been stalking? must they have been stalking?

Interro-negative form

Simple form	V-ing form
mustn't I stalk? mustn't you stalk? mustn't he stalk? mustn't we stalk? mustn't you stalk? mustn't they stalk?	mustn't I be stalking? mustn't you be stalking? mustn't he be stalking? mustn't we be stalking? mustn't you be stalking? mustn't they be stalking?
Perfect	V-ing perfect
mustn't I have stalked? mustn't you have stalked? mustn't he have stalked? mustn't we have stalked? mustn't you have stalked? mustn't they have stalked?	mustn't I have been stalking? mustn't you have been stalking? mustn't he have been stalking? mustn't we have been stalking? mustn't you have been stalking? mustn't they have been stalking?