I must compose you must compose she must compose we must compose you must compose they must compose
V-ing form
I must be composing you must be composing she must be composing we must be composing you must be composing they must be composing
Perfect
I must have composed you must have composed she must have composed we must have composed you must have composed they must have composed
V-ing perfect
I must have been composing you must have been composing she must have been composing we must have been composing you must have been composing they must have been composing
Negation
Simple form
I must not compose you must not compose she must not compose we must not compose you must not compose they must not compose
V-ing form
I must not be composing you must not be composing she must not be composing we must not be composing you must not be composing they must not be composing
Perfect
I must not have composed you must not have composed she must not have composed we must not have composed you must not have composed they must not have composed
V-ing perfect
I must not have been composing you must not have been composing she must not have been composing we must not have been composing you must not have been composing they must not have been composing
Interrogative form
Simple form
must I compose? must you compose? must she compose? must we compose? must you compose? must they compose?
V-ing form
must I be composing? must you be composing? must she be composing? must we be composing? must you be composing? must they be composing?
Perfect
must I have composed? must you have composed? must she have composed? must we have composed? must you have composed? must they have composed?
V-ing perfect
must I have been composing? must you have been composing? must she have been composing? must we have been composing? must you have been composing? must they have been composing?
Interro-negative form
Simple form
must I not compose? must you not compose? must she not compose? must we not compose? must you not compose? must they not compose?
V-ing form
must I not be composing? must you not be composing? must she not be composing? must we not be composing? must you not be composing? must they not be composing?
Perfect
must I not have composed? must you not have composed? must she not have composed? must we not have composed? must you not have composed? must they not have composed?
V-ing perfect
must I not have been composing? must you not have been composing? must she not have been composing? must we not have been composing? must you not have been composing? must they not have been composing?