I must clear you must clear he must clear we must clear you must clear they must clear
V-ing form
I must be clearing you must be clearing he must be clearing we must be clearing you must be clearing they must be clearing
Perfect
I must have cleared you must have cleared he must have cleared we must have cleared you must have cleared they must have cleared
V-ing perfect
I must have been clearing you must have been clearing he must have been clearing we must have been clearing you must have been clearing they must have been clearing
Negation
Simple form
I must not clear you must not clear he must not clear we must not clear you must not clear they must not clear
V-ing form
I must not be clearing you must not be clearing he must not be clearing we must not be clearing you must not be clearing they must not be clearing
Perfect
I must not have cleared you must not have cleared he must not have cleared we must not have cleared you must not have cleared they must not have cleared
V-ing perfect
I must not have been clearing you must not have been clearing he must not have been clearing we must not have been clearing you must not have been clearing they must not have been clearing
Interrogative form
Simple form
must I clear? must you clear? must he clear? must we clear? must you clear? must they clear?
V-ing form
must I be clearing? must you be clearing? must he be clearing? must we be clearing? must you be clearing? must they be clearing?
Perfect
must I have cleared? must you have cleared? must he have cleared? must we have cleared? must you have cleared? must they have cleared?
V-ing perfect
must I have been clearing? must you have been clearing? must he have been clearing? must we have been clearing? must you have been clearing? must they have been clearing?
Interro-negative form
Simple form
must I not clear? must you not clear? must he not clear? must we not clear? must you not clear? must they not clear?
V-ing form
must I not be clearing? must you not be clearing? must he not be clearing? must we not be clearing? must you not be clearing? must they not be clearing?
Perfect
must I not have cleared? must you not have cleared? must he not have cleared? must we not have cleared? must you not have cleared? must they not have cleared?
V-ing perfect
must I not have been clearing? must you not have been clearing? must he not have been clearing? must we not have been clearing? must you not have been clearing? must they not have been clearing?