I must smash you must smash he must smash we must smash you must smash they must smash
V-ing form
I must be smashing you must be smashing he must be smashing we must be smashing you must be smashing they must be smashing
Perfect
I must have smashed you must have smashed he must have smashed we must have smashed you must have smashed they must have smashed
V-ing perfect
I must have been smashing you must have been smashing he must have been smashing we must have been smashing you must have been smashing they must have been smashing
Negation
Simple form
I must not smash you must not smash he must not smash we must not smash you must not smash they must not smash
V-ing form
I must not be smashing you must not be smashing he must not be smashing we must not be smashing you must not be smashing they must not be smashing
Perfect
I must not have smashed you must not have smashed he must not have smashed we must not have smashed you must not have smashed they must not have smashed
V-ing perfect
I must not have been smashing you must not have been smashing he must not have been smashing we must not have been smashing you must not have been smashing they must not have been smashing
Interrogative form
Simple form
must I smash? must you smash? must he smash? must we smash? must you smash? must they smash?
V-ing form
must I be smashing? must you be smashing? must he be smashing? must we be smashing? must you be smashing? must they be smashing?
Perfect
must I have smashed? must you have smashed? must he have smashed? must we have smashed? must you have smashed? must they have smashed?
V-ing perfect
must I have been smashing? must you have been smashing? must he have been smashing? must we have been smashing? must you have been smashing? must they have been smashing?
Interro-negative form
Simple form
must I not smash? must you not smash? must he not smash? must we not smash? must you not smash? must they not smash?
V-ing form
must I not be smashing? must you not be smashing? must he not be smashing? must we not be smashing? must you not be smashing? must they not be smashing?
Perfect
must I not have smashed? must you not have smashed? must he not have smashed? must we not have smashed? must you not have smashed? must they not have smashed?
V-ing perfect
must I not have been smashing? must you not have been smashing? must he not have been smashing? must we not have been smashing? must you not have been smashing? must they not have been smashing?