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