English verb conjugation
MUST FILCH

Regular verb: filch - filched - filched

Affirmation

Simple form	V-ing form
I must filch you must filch he must filch we must filch you must filch they must filch	I must be filching you must be filching he must be filching we must be filching you must be filching they must be filching
Perfect	V-ing perfect
I must have filched you must have filched he must have filched we must have filched you must have filched they must have filched	I must have been filching you must have been filching he must have been filching we must have been filching you must have been filching they must have been filching

Negation

Simple form	V-ing form
I mustn't filch you mustn't filch he mustn't filch we mustn't filch you mustn't filch they mustn't filch	I mustn't be filching you mustn't be filching he mustn't be filching we mustn't be filching you mustn't be filching they mustn't be filching
Perfect	V-ing perfect
I mustn't have filched you mustn't have filched he mustn't have filched we mustn't have filched you mustn't have filched they mustn't have filched	I mustn't have been filching you mustn't have been filching he mustn't have been filching we mustn't have been filching you mustn't have been filching they mustn't have been filching

Interrogative form

Simple form	V-ing form
must I filch? must you filch? must he filch? must we filch? must you filch? must they filch?	must I be filching? must you be filching? must he be filching? must we be filching? must you be filching? must they be filching?
Perfect	V-ing perfect
must I have filched? must you have filched? must he have filched? must we have filched? must you have filched? must they have filched?	must I have been filching? must you have been filching? must he have been filching? must we have been filching? must you have been filching? must they have been filching?

Interro-negative form

Simple form	V-ing form
mustn't I filch? mustn't you filch? mustn't he filch? mustn't we filch? mustn't you filch? mustn't they filch?	mustn't I be filching? mustn't you be filching? mustn't he be filching? mustn't we be filching? mustn't you be filching? mustn't they be filching?
Perfect	V-ing perfect
mustn't I have filched? mustn't you have filched? mustn't he have filched? mustn't we have filched? mustn't you have filched? mustn't they have filched?	mustn't I have been filching? mustn't you have been filching? mustn't he have been filching? mustn't we have been filching? mustn't you have been filching? mustn't they have been filching?