I must perpetuate you must perpetuate he must perpetuate we must perpetuate you must perpetuate they must perpetuate
V-ing form
I must be perpetuating you must be perpetuating he must be perpetuating we must be perpetuating you must be perpetuating they must be perpetuating
Perfect
I must have perpetuated you must have perpetuated he must have perpetuated we must have perpetuated you must have perpetuated they must have perpetuated
V-ing perfect
I must have been perpetuating you must have been perpetuating he must have been perpetuating we must have been perpetuating you must have been perpetuating they must have been perpetuating
Negation
Simple form
I must not perpetuate you must not perpetuate he must not perpetuate we must not perpetuate you must not perpetuate they must not perpetuate
V-ing form
I must not be perpetuating you must not be perpetuating he must not be perpetuating we must not be perpetuating you must not be perpetuating they must not be perpetuating
Perfect
I must not have perpetuated you must not have perpetuated he must not have perpetuated we must not have perpetuated you must not have perpetuated they must not have perpetuated
V-ing perfect
I must not have been perpetuating you must not have been perpetuating he must not have been perpetuating we must not have been perpetuating you must not have been perpetuating they must not have been perpetuating
Interrogative form
Simple form
must I perpetuate? must you perpetuate? must he perpetuate? must we perpetuate? must you perpetuate? must they perpetuate?
V-ing form
must I be perpetuating? must you be perpetuating? must he be perpetuating? must we be perpetuating? must you be perpetuating? must they be perpetuating?
Perfect
must I have perpetuated? must you have perpetuated? must he have perpetuated? must we have perpetuated? must you have perpetuated? must they have perpetuated?
V-ing perfect
must I have been perpetuating? must you have been perpetuating? must he have been perpetuating? must we have been perpetuating? must you have been perpetuating? must they have been perpetuating?
Interro-negative form
Simple form
must I not perpetuate? must you not perpetuate? must he not perpetuate? must we not perpetuate? must you not perpetuate? must they not perpetuate?
V-ing form
must I not be perpetuating? must you not be perpetuating? must he not be perpetuating? must we not be perpetuating? must you not be perpetuating? must they not be perpetuating?
Perfect
must I not have perpetuated? must you not have perpetuated? must he not have perpetuated? must we not have perpetuated? must you not have perpetuated? must they not have perpetuated?
V-ing perfect
must I not have been perpetuating? must you not have been perpetuating? must he not have been perpetuating? must we not have been perpetuating? must you not have been perpetuating? must they not have been perpetuating?