I must bake you must bake she must bake we must bake you must bake they must bake
V-ing form
I must be baking you must be baking she must be baking we must be baking you must be baking they must be baking
Perfect
I must have baked you must have baked she must have baked we must have baked you must have baked they must have baked
V-ing perfect
I must have been baking you must have been baking she must have been baking we must have been baking you must have been baking they must have been baking
Negation
Simple form
I must not bake you must not bake she must not bake we must not bake you must not bake they must not bake
V-ing form
I must not be baking you must not be baking she must not be baking we must not be baking you must not be baking they must not be baking
Perfect
I must not have baked you must not have baked she must not have baked we must not have baked you must not have baked they must not have baked
V-ing perfect
I must not have been baking you must not have been baking she must not have been baking we must not have been baking you must not have been baking they must not have been baking
Interrogative form
Simple form
must I bake? must you bake? must she bake? must we bake? must you bake? must they bake?
V-ing form
must I be baking? must you be baking? must she be baking? must we be baking? must you be baking? must they be baking?
Perfect
must I have baked? must you have baked? must she have baked? must we have baked? must you have baked? must they have baked?
V-ing perfect
must I have been baking? must you have been baking? must she have been baking? must we have been baking? must you have been baking? must they have been baking?
Interro-negative form
Simple form
must I not bake? must you not bake? must she not bake? must we not bake? must you not bake? must they not bake?
V-ing form
must I not be baking? must you not be baking? must she not be baking? must we not be baking? must you not be baking? must they not be baking?
Perfect
must I not have baked? must you not have baked? must she not have baked? must we not have baked? must you not have baked? must they not have baked?
V-ing perfect
must I not have been baking? must you not have been baking? must she not have been baking? must we not have been baking? must you not have been baking? must they not have been baking?