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