I must entrench you must entrench he must entrench we must entrench you must entrench they must entrench
V-ing form
I must be entrenching you must be entrenching he must be entrenching we must be entrenching you must be entrenching they must be entrenching
Perfect
I must have entrenched you must have entrenched he must have entrenched we must have entrenched you must have entrenched they must have entrenched
V-ing perfect
I must have been entrenching you must have been entrenching he must have been entrenching we must have been entrenching you must have been entrenching they must have been entrenching
Negation
Simple form
I mustn't entrench you mustn't entrench he mustn't entrench we mustn't entrench you mustn't entrench they mustn't entrench
V-ing form
I mustn't be entrenching you mustn't be entrenching he mustn't be entrenching we mustn't be entrenching you mustn't be entrenching they mustn't be entrenching
Perfect
I mustn't have entrenched you mustn't have entrenched he mustn't have entrenched we mustn't have entrenched you mustn't have entrenched they mustn't have entrenched
V-ing perfect
I mustn't have been entrenching you mustn't have been entrenching he mustn't have been entrenching we mustn't have been entrenching you mustn't have been entrenching they mustn't have been entrenching
Interrogative form
Simple form
must I entrench? must you entrench? must he entrench? must we entrench? must you entrench? must they entrench?
V-ing form
must I be entrenching? must you be entrenching? must he be entrenching? must we be entrenching? must you be entrenching? must they be entrenching?
Perfect
must I have entrenched? must you have entrenched? must he have entrenched? must we have entrenched? must you have entrenched? must they have entrenched?
V-ing perfect
must I have been entrenching? must you have been entrenching? must he have been entrenching? must we have been entrenching? must you have been entrenching? must they have been entrenching?
Interro-negative form
Simple form
mustn't I entrench? mustn't you entrench? mustn't he entrench? mustn't we entrench? mustn't you entrench? mustn't they entrench?
V-ing form
mustn't I be entrenching? mustn't you be entrenching? mustn't he be entrenching? mustn't we be entrenching? mustn't you be entrenching? mustn't they be entrenching?
Perfect
mustn't I have entrenched? mustn't you have entrenched? mustn't he have entrenched? mustn't we have entrenched? mustn't you have entrenched? mustn't they have entrenched?
V-ing perfect
mustn't I have been entrenching? mustn't you have been entrenching? mustn't he have been entrenching? mustn't we have been entrenching? mustn't you have been entrenching? mustn't they have been entrenching?