I must enclose you must enclose he must enclose we must enclose you must enclose they must enclose
V-ing form
I must be enclosing you must be enclosing he must be enclosing we must be enclosing you must be enclosing they must be enclosing
Perfect
I must have enclosed you must have enclosed he must have enclosed we must have enclosed you must have enclosed they must have enclosed
V-ing perfect
I must have been enclosing you must have been enclosing he must have been enclosing we must have been enclosing you must have been enclosing they must have been enclosing
Negation
Simple form
I must not enclose you must not enclose he must not enclose we must not enclose you must not enclose they must not enclose
V-ing form
I must not be enclosing you must not be enclosing he must not be enclosing we must not be enclosing you must not be enclosing they must not be enclosing
Perfect
I must not have enclosed you must not have enclosed he must not have enclosed we must not have enclosed you must not have enclosed they must not have enclosed
V-ing perfect
I must not have been enclosing you must not have been enclosing he must not have been enclosing we must not have been enclosing you must not have been enclosing they must not have been enclosing
Interrogative form
Simple form
must I enclose? must you enclose? must he enclose? must we enclose? must you enclose? must they enclose?
V-ing form
must I be enclosing? must you be enclosing? must he be enclosing? must we be enclosing? must you be enclosing? must they be enclosing?
Perfect
must I have enclosed? must you have enclosed? must he have enclosed? must we have enclosed? must you have enclosed? must they have enclosed?
V-ing perfect
must I have been enclosing? must you have been enclosing? must he have been enclosing? must we have been enclosing? must you have been enclosing? must they have been enclosing?
Interro-negative form
Simple form
must I not enclose? must you not enclose? must he not enclose? must we not enclose? must you not enclose? must they not enclose?
V-ing form
must I not be enclosing? must you not be enclosing? must he not be enclosing? must we not be enclosing? must you not be enclosing? must they not be enclosing?
Perfect
must I not have enclosed? must you not have enclosed? must he not have enclosed? must we not have enclosed? must you not have enclosed? must they not have enclosed?
V-ing perfect
must I not have been enclosing? must you not have been enclosing? must he not have been enclosing? must we not have been enclosing? must you not have been enclosing? must they not have been enclosing?