I must pencil you must pencil she must pencil we must pencil you must pencil they must pencil
V-ing form
I must be pencilling you must be pencilling she must be pencilling we must be pencilling you must be pencilling they must be pencilling
Perfect
I must have pencilled you must have pencilled she 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 she 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 she 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 she 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 she 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 she 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 she pencil? must we pencil? must you pencil? must they pencil?
V-ing form
must I be pencilling? must you be pencilling? must she be pencilling? must we be pencilling? must you be pencilling? must they be pencilling?
Perfect
must I have pencilled? must you have pencilled? must she 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 she 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 she 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 she 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 she 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 she have been pencilling? mustn't we have been pencilling? mustn't you have been pencilling? mustn't they have been pencilling?