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