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