I must explore you must explore he must explore we must explore you must explore they must explore
V-ing form
I must be exploring you must be exploring he must be exploring we must be exploring you must be exploring they must be exploring
Perfect
I must have explored you must have explored he must have explored we must have explored you must have explored they must have explored
V-ing perfect
I must have been exploring you must have been exploring he must have been exploring we must have been exploring you must have been exploring they must have been exploring
Negation
Simple form
I must not explore you must not explore he must not explore we must not explore you must not explore they must not explore
V-ing form
I must not be exploring you must not be exploring he must not be exploring we must not be exploring you must not be exploring they must not be exploring
Perfect
I must not have explored you must not have explored he must not have explored we must not have explored you must not have explored they must not have explored
V-ing perfect
I must not have been exploring you must not have been exploring he must not have been exploring we must not have been exploring you must not have been exploring they must not have been exploring
Interrogative form
Simple form
must I explore? must you explore? must he explore? must we explore? must you explore? must they explore?
V-ing form
must I be exploring? must you be exploring? must he be exploring? must we be exploring? must you be exploring? must they be exploring?
Perfect
must I have explored? must you have explored? must he have explored? must we have explored? must you have explored? must they have explored?
V-ing perfect
must I have been exploring? must you have been exploring? must he have been exploring? must we have been exploring? must you have been exploring? must they have been exploring?
Interro-negative form
Simple form
must I not explore? must you not explore? must he not explore? must we not explore? must you not explore? must they not explore?
V-ing form
must I not be exploring? must you not be exploring? must he not be exploring? must we not be exploring? must you not be exploring? must they not be exploring?
Perfect
must I not have explored? must you not have explored? must he not have explored? must we not have explored? must you not have explored? must they not have explored?
V-ing perfect
must I not have been exploring? must you not have been exploring? must he not have been exploring? must we not have been exploring? must you not have been exploring? must they not have been exploring?