I must compute you must compute he must compute we must compute you must compute they must compute
V-ing form
I must be computing you must be computing he must be computing we must be computing you must be computing they must be computing
Perfect
I must have computed you must have computed he must have computed we must have computed you must have computed they must have computed
V-ing perfect
I must have been computing you must have been computing he must have been computing we must have been computing you must have been computing they must have been computing
Negation
Simple form
I must not compute you must not compute he must not compute we must not compute you must not compute they must not compute
V-ing form
I must not be computing you must not be computing he must not be computing we must not be computing you must not be computing they must not be computing
Perfect
I must not have computed you must not have computed he must not have computed we must not have computed you must not have computed they must not have computed
V-ing perfect
I must not have been computing you must not have been computing he must not have been computing we must not have been computing you must not have been computing they must not have been computing
Interrogative form
Simple form
must I compute? must you compute? must he compute? must we compute? must you compute? must they compute?
V-ing form
must I be computing? must you be computing? must he be computing? must we be computing? must you be computing? must they be computing?
Perfect
must I have computed? must you have computed? must he have computed? must we have computed? must you have computed? must they have computed?
V-ing perfect
must I have been computing? must you have been computing? must he have been computing? must we have been computing? must you have been computing? must they have been computing?
Interro-negative form
Simple form
must I not compute? must you not compute? must he not compute? must we not compute? must you not compute? must they not compute?
V-ing form
must I not be computing? must you not be computing? must he not be computing? must we not be computing? must you not be computing? must they not be computing?
Perfect
must I not have computed? must you not have computed? must he not have computed? must we not have computed? must you not have computed? must they not have computed?
V-ing perfect
must I not have been computing? must you not have been computing? must he not have been computing? must we not have been computing? must you not have been computing? must they not have been computing?