English verb conjugation
MUST DOUBLE-LOCK

Regular verb: double-lock - double-locked - double-locked

Affirmation

Simple form	V-ing form
I must double-lock you must double-lock he must double-lock we must double-lock you must double-lock they must double-lock	I must be double-locking you must be double-locking he must be double-locking we must be double-locking you must be double-locking they must be double-locking
Perfect	V-ing perfect
I must have double-locked you must have double-locked he must have double-locked we must have double-locked you must have double-locked they must have double-locked	I must have been double-locking you must have been double-locking he must have been double-locking we must have been double-locking you must have been double-locking they must have been double-locking

Negation

Simple form	V-ing form
I mustn't double-lock you mustn't double-lock he mustn't double-lock we mustn't double-lock you mustn't double-lock they mustn't double-lock	I mustn't be double-locking you mustn't be double-locking he mustn't be double-locking we mustn't be double-locking you mustn't be double-locking they mustn't be double-locking
Perfect	V-ing perfect
I mustn't have double-locked you mustn't have double-locked he mustn't have double-locked we mustn't have double-locked you mustn't have double-locked they mustn't have double-locked	I mustn't have been double-locking you mustn't have been double-locking he mustn't have been double-locking we mustn't have been double-locking you mustn't have been double-locking they mustn't have been double-locking

Interrogative form

Simple form	V-ing form
must I double-lock? must you double-lock? must he double-lock? must we double-lock? must you double-lock? must they double-lock?	must I be double-locking? must you be double-locking? must he be double-locking? must we be double-locking? must you be double-locking? must they be double-locking?
Perfect	V-ing perfect
must I have double-locked? must you have double-locked? must he have double-locked? must we have double-locked? must you have double-locked? must they have double-locked?	must I have been double-locking? must you have been double-locking? must he have been double-locking? must we have been double-locking? must you have been double-locking? must they have been double-locking?

Interro-negative form

Simple form	V-ing form
mustn't I double-lock? mustn't you double-lock? mustn't he double-lock? mustn't we double-lock? mustn't you double-lock? mustn't they double-lock?	mustn't I be double-locking? mustn't you be double-locking? mustn't he be double-locking? mustn't we be double-locking? mustn't you be double-locking? mustn't they be double-locking?
Perfect	V-ing perfect
mustn't I have double-locked? mustn't you have double-locked? mustn't he have double-locked? mustn't we have double-locked? mustn't you have double-locked? mustn't they have double-locked?	mustn't I have been double-locking? mustn't you have been double-locking? mustn't he have been double-locking? mustn't we have been double-locking? mustn't you have been double-locking? mustn't they have been double-locking?