I must devastate you must devastate he must devastate we must devastate you must devastate they must devastate
V-ing form
I must be devastating you must be devastating he must be devastating we must be devastating you must be devastating they must be devastating
Perfect
I must have devastated you must have devastated he must have devastated we must have devastated you must have devastated they must have devastated
V-ing perfect
I must have been devastating you must have been devastating he must have been devastating we must have been devastating you must have been devastating they must have been devastating
Negation
Simple form
I must not devastate you must not devastate he must not devastate we must not devastate you must not devastate they must not devastate
V-ing form
I must not be devastating you must not be devastating he must not be devastating we must not be devastating you must not be devastating they must not be devastating
Perfect
I must not have devastated you must not have devastated he must not have devastated we must not have devastated you must not have devastated they must not have devastated
V-ing perfect
I must not have been devastating you must not have been devastating he must not have been devastating we must not have been devastating you must not have been devastating they must not have been devastating
Interrogative form
Simple form
must I devastate? must you devastate? must he devastate? must we devastate? must you devastate? must they devastate?
V-ing form
must I be devastating? must you be devastating? must he be devastating? must we be devastating? must you be devastating? must they be devastating?
Perfect
must I have devastated? must you have devastated? must he have devastated? must we have devastated? must you have devastated? must they have devastated?
V-ing perfect
must I have been devastating? must you have been devastating? must he have been devastating? must we have been devastating? must you have been devastating? must they have been devastating?
Interro-negative form
Simple form
must I not devastate? must you not devastate? must he not devastate? must we not devastate? must you not devastate? must they not devastate?
V-ing form
must I not be devastating? must you not be devastating? must he not be devastating? must we not be devastating? must you not be devastating? must they not be devastating?
Perfect
must I not have devastated? must you not have devastated? must he not have devastated? must we not have devastated? must you not have devastated? must they not have devastated?
V-ing perfect
must I not have been devastating? must you not have been devastating? must he not have been devastating? must we not have been devastating? must you not have been devastating? must they not have been devastating?