I must attorn you must attorn he must attorn we must attorn you must attorn they must attorn
V-ing form
I must be attorning you must be attorning he must be attorning we must be attorning you must be attorning they must be attorning
Perfect
I must have attorned you must have attorned he must have attorned we must have attorned you must have attorned they must have attorned
V-ing perfect
I must have been attorning you must have been attorning he must have been attorning we must have been attorning you must have been attorning they must have been attorning
Negation
Simple form
I must not attorn you must not attorn he must not attorn we must not attorn you must not attorn they must not attorn
V-ing form
I must not be attorning you must not be attorning he must not be attorning we must not be attorning you must not be attorning they must not be attorning
Perfect
I must not have attorned you must not have attorned he must not have attorned we must not have attorned you must not have attorned they must not have attorned
V-ing perfect
I must not have been attorning you must not have been attorning he must not have been attorning we must not have been attorning you must not have been attorning they must not have been attorning
Interrogative form
Simple form
must I attorn? must you attorn? must he attorn? must we attorn? must you attorn? must they attorn?
V-ing form
must I be attorning? must you be attorning? must he be attorning? must we be attorning? must you be attorning? must they be attorning?
Perfect
must I have attorned? must you have attorned? must he have attorned? must we have attorned? must you have attorned? must they have attorned?
V-ing perfect
must I have been attorning? must you have been attorning? must he have been attorning? must we have been attorning? must you have been attorning? must they have been attorning?
Interro-negative form
Simple form
must I not attorn? must you not attorn? must he not attorn? must we not attorn? must you not attorn? must they not attorn?
V-ing form
must I not be attorning? must you not be attorning? must he not be attorning? must we not be attorning? must you not be attorning? must they not be attorning?
Perfect
must I not have attorned? must you not have attorned? must he not have attorned? must we not have attorned? must you not have attorned? must they not have attorned?
V-ing perfect
must I not have been attorning? must you not have been attorning? must he not have been attorning? must we not have been attorning? must you not have been attorning? must they not have been attorning?