I must escape you must escape she must escape we must escape you must escape they must escape
V-ing form
I must be escaping you must be escaping she must be escaping we must be escaping you must be escaping they must be escaping
Perfect
I must have escaped you must have escaped she must have escaped we must have escaped you must have escaped they must have escaped
V-ing perfect
I must have been escaping you must have been escaping she must have been escaping we must have been escaping you must have been escaping they must have been escaping
Negation
Simple form
I must not escape you must not escape she must not escape we must not escape you must not escape they must not escape
V-ing form
I must not be escaping you must not be escaping she must not be escaping we must not be escaping you must not be escaping they must not be escaping
Perfect
I must not have escaped you must not have escaped she must not have escaped we must not have escaped you must not have escaped they must not have escaped
V-ing perfect
I must not have been escaping you must not have been escaping she must not have been escaping we must not have been escaping you must not have been escaping they must not have been escaping
Interrogative form
Simple form
must I escape? must you escape? must she escape? must we escape? must you escape? must they escape?
V-ing form
must I be escaping? must you be escaping? must she be escaping? must we be escaping? must you be escaping? must they be escaping?
Perfect
must I have escaped? must you have escaped? must she have escaped? must we have escaped? must you have escaped? must they have escaped?
V-ing perfect
must I have been escaping? must you have been escaping? must she have been escaping? must we have been escaping? must you have been escaping? must they have been escaping?
Interro-negative form
Simple form
must I not escape? must you not escape? must she not escape? must we not escape? must you not escape? must they not escape?
V-ing form
must I not be escaping? must you not be escaping? must she not be escaping? must we not be escaping? must you not be escaping? must they not be escaping?
Perfect
must I not have escaped? must you not have escaped? must she not have escaped? must we not have escaped? must you not have escaped? must they not have escaped?
V-ing perfect
must I not have been escaping? must you not have been escaping? must she not have been escaping? must we not have been escaping? must you not have been escaping? must they not have been escaping?