I must amend you must amend he must amend we must amend you must amend they must amend
V-ing form
I must be amending you must be amending he must be amending we must be amending you must be amending they must be amending
Perfect
I must have amended you must have amended he must have amended we must have amended you must have amended they must have amended
V-ing perfect
I must have been amending you must have been amending he must have been amending we must have been amending you must have been amending they must have been amending
Negation
Simple form
I must not amend you must not amend he must not amend we must not amend you must not amend they must not amend
V-ing form
I must not be amending you must not be amending he must not be amending we must not be amending you must not be amending they must not be amending
Perfect
I must not have amended you must not have amended he must not have amended we must not have amended you must not have amended they must not have amended
V-ing perfect
I must not have been amending you must not have been amending he must not have been amending we must not have been amending you must not have been amending they must not have been amending
Interrogative form
Simple form
must I amend? must you amend? must he amend? must we amend? must you amend? must they amend?
V-ing form
must I be amending? must you be amending? must he be amending? must we be amending? must you be amending? must they be amending?
Perfect
must I have amended? must you have amended? must he have amended? must we have amended? must you have amended? must they have amended?
V-ing perfect
must I have been amending? must you have been amending? must he have been amending? must we have been amending? must you have been amending? must they have been amending?
Interro-negative form
Simple form
must I not amend? must you not amend? must he not amend? must we not amend? must you not amend? must they not amend?
V-ing form
must I not be amending? must you not be amending? must he not be amending? must we not be amending? must you not be amending? must they not be amending?
Perfect
must I not have amended? must you not have amended? must he not have amended? must we not have amended? must you not have amended? must they not have amended?
V-ing perfect
must I not have been amending? must you not have been amending? must he not have been amending? must we not have been amending? must you not have been amending? must they not have been amending?