I must drape you must drape she must drape we must drape you must drape they must drape
V-ing form
I must be draping you must be draping she must be draping we must be draping you must be draping they must be draping
Perfect
I must have draped you must have draped she 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 she must have been draping we must have been draping you must have been draping they must have been draping
Negation
Simple form
I must not drape you must not drape she must not drape we must not drape you must not drape they must not drape
V-ing form
I must not be draping you must not be draping she must not be draping we must not be draping you must not be draping they must not be draping
Perfect
I must not have draped you must not have draped she must not have draped we must not have draped you must not have draped they must not have draped
V-ing perfect
I must not have been draping you must not have been draping she must not have been draping we must not have been draping you must not have been draping they must not have been draping
Interrogative form
Simple form
must I drape? must you drape? must she drape? must we drape? must you drape? must they drape?
V-ing form
must I be draping? must you be draping? must she be draping? must we be draping? must you be draping? must they be draping?
Perfect
must I have draped? must you have draped? must she 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 she have been draping? must we have been draping? must you have been draping? must they have been draping?
Interro-negative form
Simple form
must I not drape? must you not drape? must she not drape? must we not drape? must you not drape? must they not drape?
V-ing form
must I not be draping? must you not be draping? must she not be draping? must we not be draping? must you not be draping? must they not be draping?
Perfect
must I not have draped? must you not have draped? must she not have draped? must we not have draped? must you not have draped? must they not have draped?
V-ing perfect
must I not have been draping? must you not have been draping? must she not have been draping? must we not have been draping? must you not have been draping? must they not have been draping?