I must carve you must carve she must carve we must carve you must carve they must carve
V-ing form
I must be carving you must be carving she must be carving we must be carving you must be carving they must be carving
Perfect
I must have carved you must have carved she must have carved we must have carved you must have carved they must have carved
V-ing perfect
I must have been carving you must have been carving she must have been carving we must have been carving you must have been carving they must have been carving
Negation
Simple form
I must not carve you must not carve she must not carve we must not carve you must not carve they must not carve
V-ing form
I must not be carving you must not be carving she must not be carving we must not be carving you must not be carving they must not be carving
Perfect
I must not have carved you must not have carved she must not have carved we must not have carved you must not have carved they must not have carved
V-ing perfect
I must not have been carving you must not have been carving she must not have been carving we must not have been carving you must not have been carving they must not have been carving
Interrogative form
Simple form
must I carve? must you carve? must she carve? must we carve? must you carve? must they carve?
V-ing form
must I be carving? must you be carving? must she be carving? must we be carving? must you be carving? must they be carving?
Perfect
must I have carved? must you have carved? must she have carved? must we have carved? must you have carved? must they have carved?
V-ing perfect
must I have been carving? must you have been carving? must she have been carving? must we have been carving? must you have been carving? must they have been carving?
Interro-negative form
Simple form
must I not carve? must you not carve? must she not carve? must we not carve? must you not carve? must they not carve?
V-ing form
must I not be carving? must you not be carving? must she not be carving? must we not be carving? must you not be carving? must they not be carving?
Perfect
must I not have carved? must you not have carved? must she not have carved? must we not have carved? must you not have carved? must they not have carved?
V-ing perfect
must I not have been carving? must you not have been carving? must she not have been carving? must we not have been carving? must you not have been carving? must they not have been carving?