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 mustn't explore you mustn't explore he mustn't explore we mustn't explore you mustn't explore they mustn't explore
V-ing form
I mustn't be exploring you mustn't be exploring he mustn't be exploring we mustn't be exploring you mustn't be exploring they mustn't be exploring
Perfect
I mustn't have explored you mustn't have explored he mustn't have explored we mustn't have explored you mustn't have explored they mustn't have explored
V-ing perfect
I mustn't have been exploring you mustn't have been exploring he mustn't have been exploring we mustn't have been exploring you mustn't have been exploring they mustn't 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
mustn't I explore? mustn't you explore? mustn't he explore? mustn't we explore? mustn't you explore? mustn't they explore?
V-ing form
mustn't I be exploring? mustn't you be exploring? mustn't he be exploring? mustn't we be exploring? mustn't you be exploring? mustn't they be exploring?
Perfect
mustn't I have explored? mustn't you have explored? mustn't he have explored? mustn't we have explored? mustn't you have explored? mustn't they have explored?
V-ing perfect
mustn't I have been exploring? mustn't you have been exploring? mustn't he have been exploring? mustn't we have been exploring? mustn't you have been exploring? mustn't they have been exploring?