I must pollute you must pollute he must pollute we must pollute you must pollute they must pollute
V-ing form
I must be polluting you must be polluting he must be polluting we must be polluting you must be polluting they must be polluting
Perfect
I must have polluted you must have polluted he must have polluted we must have polluted you must have polluted they must have polluted
V-ing perfect
I must have been polluting you must have been polluting he must have been polluting we must have been polluting you must have been polluting they must have been polluting
Negation
Simple form
I must not pollute you must not pollute he must not pollute we must not pollute you must not pollute they must not pollute
V-ing form
I must not be polluting you must not be polluting he must not be polluting we must not be polluting you must not be polluting they must not be polluting
Perfect
I must not have polluted you must not have polluted he must not have polluted we must not have polluted you must not have polluted they must not have polluted
V-ing perfect
I must not have been polluting you must not have been polluting he must not have been polluting we must not have been polluting you must not have been polluting they must not have been polluting
Interrogative form
Simple form
must I pollute? must you pollute? must he pollute? must we pollute? must you pollute? must they pollute?
V-ing form
must I be polluting? must you be polluting? must he be polluting? must we be polluting? must you be polluting? must they be polluting?
Perfect
must I have polluted? must you have polluted? must he have polluted? must we have polluted? must you have polluted? must they have polluted?
V-ing perfect
must I have been polluting? must you have been polluting? must he have been polluting? must we have been polluting? must you have been polluting? must they have been polluting?
Interro-negative form
Simple form
must I not pollute? must you not pollute? must he not pollute? must we not pollute? must you not pollute? must they not pollute?
V-ing form
must I not be polluting? must you not be polluting? must he not be polluting? must we not be polluting? must you not be polluting? must they not be polluting?
Perfect
must I not have polluted? must you not have polluted? must he not have polluted? must we not have polluted? must you not have polluted? must they not have polluted?
V-ing perfect
must I not have been polluting? must you not have been polluting? must he not have been polluting? must we not have been polluting? must you not have been polluting? must they not have been polluting?