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 must not pencil you must not pencil she must not pencil we must not pencil you must not pencil they must not pencil
V-ing form
I must not be pencilling you must not be pencilling she must not be pencilling we must not be pencilling you must not be pencilling they must not be pencilling
Perfect
I must not have pencilled you must not have pencilled she must not have pencilled we must not have pencilled you must not have pencilled they must not have pencilled
V-ing perfect
I must not have been pencilling you must not have been pencilling she must not have been pencilling we must not have been pencilling you must not have been pencilling they must not 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
must I not pencil? must you not pencil? must she not pencil? must we not pencil? must you not pencil? must they not pencil?
V-ing form
must I not be pencilling? must you not be pencilling? must she not be pencilling? must we not be pencilling? must you not be pencilling? must they not be pencilling?
Perfect
must I not have pencilled? must you not have pencilled? must she not have pencilled? must we not have pencilled? must you not have pencilled? must they not have pencilled?
V-ing perfect
must I not have been pencilling? must you not have been pencilling? must she not have been pencilling? must we not have been pencilling? must you not have been pencilling? must they not have been pencilling?