I must offîceii you must offîceii she must offîceii we must offîceii you must offîceii they must offîceii
V-ing form
I must be offîceiiing you must be offîceiiing she must be offîceiiing we must be offîceiiing you must be offîceiiing they must be offîceiiing
Perfect
I must have offîceiied you must have offîceiied she must have offîceiied we must have offîceiied you must have offîceiied they must have offîceiied
V-ing perfect
I must have been offîceiiing you must have been offîceiiing she must have been offîceiiing we must have been offîceiiing you must have been offîceiiing they must have been offîceiiing
Negation
Simple form
I must not offîceii you must not offîceii she must not offîceii we must not offîceii you must not offîceii they must not offîceii
V-ing form
I must not be offîceiiing you must not be offîceiiing she must not be offîceiiing we must not be offîceiiing you must not be offîceiiing they must not be offîceiiing
Perfect
I must not have offîceiied you must not have offîceiied she must not have offîceiied we must not have offîceiied you must not have offîceiied they must not have offîceiied
V-ing perfect
I must not have been offîceiiing you must not have been offîceiiing she must not have been offîceiiing we must not have been offîceiiing you must not have been offîceiiing they must not have been offîceiiing
Interrogative form
Simple form
must I offîceii? must you offîceii? must she offîceii? must we offîceii? must you offîceii? must they offîceii?
V-ing form
must I be offîceiiing? must you be offîceiiing? must she be offîceiiing? must we be offîceiiing? must you be offîceiiing? must they be offîceiiing?
Perfect
must I have offîceiied? must you have offîceiied? must she have offîceiied? must we have offîceiied? must you have offîceiied? must they have offîceiied?
V-ing perfect
must I have been offîceiiing? must you have been offîceiiing? must she have been offîceiiing? must we have been offîceiiing? must you have been offîceiiing? must they have been offîceiiing?
Interro-negative form
Simple form
must I not offîceii? must you not offîceii? must she not offîceii? must we not offîceii? must you not offîceii? must they not offîceii?
V-ing form
must I not be offîceiiing? must you not be offîceiiing? must she not be offîceiiing? must we not be offîceiiing? must you not be offîceiiing? must they not be offîceiiing?
Perfect
must I not have offîceiied? must you not have offîceiied? must she not have offîceiied? must we not have offîceiied? must you not have offîceiied? must they not have offîceiied?
V-ing perfect
must I not have been offîceiiing? must you not have been offîceiiing? must she not have been offîceiiing? must we not have been offîceiiing? must you not have been offîceiiing? must they not have been offîceiiing?