I must communicate you must communicate he must communicate we must communicate you must communicate they must communicate
V-ing form
I must be communicating you must be communicating he must be communicating we must be communicating you must be communicating they must be communicating
Perfect
I must have communicated you must have communicated he must have communicated we must have communicated you must have communicated they must have communicated
V-ing perfect
I must have been communicating you must have been communicating he must have been communicating we must have been communicating you must have been communicating they must have been communicating
Negation
Simple form
I must not communicate you must not communicate he must not communicate we must not communicate you must not communicate they must not communicate
V-ing form
I must not be communicating you must not be communicating he must not be communicating we must not be communicating you must not be communicating they must not be communicating
Perfect
I must not have communicated you must not have communicated he must not have communicated we must not have communicated you must not have communicated they must not have communicated
V-ing perfect
I must not have been communicating you must not have been communicating he must not have been communicating we must not have been communicating you must not have been communicating they must not have been communicating
Interrogative form
Simple form
must I communicate? must you communicate? must he communicate? must we communicate? must you communicate? must they communicate?
V-ing form
must I be communicating? must you be communicating? must he be communicating? must we be communicating? must you be communicating? must they be communicating?
Perfect
must I have communicated? must you have communicated? must he have communicated? must we have communicated? must you have communicated? must they have communicated?
V-ing perfect
must I have been communicating? must you have been communicating? must he have been communicating? must we have been communicating? must you have been communicating? must they have been communicating?
Interro-negative form
Simple form
must I not communicate? must you not communicate? must he not communicate? must we not communicate? must you not communicate? must they not communicate?
V-ing form
must I not be communicating? must you not be communicating? must he not be communicating? must we not be communicating? must you not be communicating? must they not be communicating?
Perfect
must I not have communicated? must you not have communicated? must he not have communicated? must we not have communicated? must you not have communicated? must they not have communicated?
V-ing perfect
must I not have been communicating? must you not have been communicating? must he not have been communicating? must we not have been communicating? must you not have been communicating? must they not have been communicating?