English verb conjugation
MUST TRENCH

Regular verb: trench - trenched - trenched

Affirmation

Simple form	V-ing form
I must trench you must trench he must trench we must trench you must trench they must trench	I must be trenching you must be trenching he must be trenching we must be trenching you must be trenching they must be trenching
Perfect	V-ing perfect
I must have trenched you must have trenched he must have trenched we must have trenched you must have trenched they must have trenched	I must have been trenching you must have been trenching he must have been trenching we must have been trenching you must have been trenching they must have been trenching

Negation

Simple form	V-ing form
I mustn't trench you mustn't trench he mustn't trench we mustn't trench you mustn't trench they mustn't trench	I mustn't be trenching you mustn't be trenching he mustn't be trenching we mustn't be trenching you mustn't be trenching they mustn't be trenching
Perfect	V-ing perfect
I mustn't have trenched you mustn't have trenched he mustn't have trenched we mustn't have trenched you mustn't have trenched they mustn't have trenched	I mustn't have been trenching you mustn't have been trenching he mustn't have been trenching we mustn't have been trenching you mustn't have been trenching they mustn't have been trenching

Interrogative form

Simple form	V-ing form
must I trench? must you trench? must he trench? must we trench? must you trench? must they trench?	must I be trenching? must you be trenching? must he be trenching? must we be trenching? must you be trenching? must they be trenching?
Perfect	V-ing perfect
must I have trenched? must you have trenched? must he have trenched? must we have trenched? must you have trenched? must they have trenched?	must I have been trenching? must you have been trenching? must he have been trenching? must we have been trenching? must you have been trenching? must they have been trenching?

Interro-negative form

Simple form	V-ing form
mustn't I trench? mustn't you trench? mustn't he trench? mustn't we trench? mustn't you trench? mustn't they trench?	mustn't I be trenching? mustn't you be trenching? mustn't he be trenching? mustn't we be trenching? mustn't you be trenching? mustn't they be trenching?
Perfect	V-ing perfect
mustn't I have trenched? mustn't you have trenched? mustn't he have trenched? mustn't we have trenched? mustn't you have trenched? mustn't they have trenched?	mustn't I have been trenching? mustn't you have been trenching? mustn't he have been trenching? mustn't we have been trenching? mustn't you have been trenching? mustn't they have been trenching?