I must amend you must amend she must amend we must amend you must amend they must amend
V-ing form
I must be amending you must be amending she must be amending we must be amending you must be amending they must be amending
Perfect
I must have amended you must have amended she 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 she must have been amending we must have been amending you must have been amending they must have been amending
Negation
Simple form
I mustn't amend you mustn't amend she mustn't amend we mustn't amend you mustn't amend they mustn't amend
V-ing form
I mustn't be amending you mustn't be amending she mustn't be amending we mustn't be amending you mustn't be amending they mustn't be amending
Perfect
I mustn't have amended you mustn't have amended she mustn't have amended we mustn't have amended you mustn't have amended they mustn't have amended
V-ing perfect
I mustn't have been amending you mustn't have been amending she mustn't have been amending we mustn't have been amending you mustn't have been amending they mustn't have been amending
Interrogative form
Simple form
must I amend? must you amend? must she amend? must we amend? must you amend? must they amend?
V-ing form
must I be amending? must you be amending? must she be amending? must we be amending? must you be amending? must they be amending?
Perfect
must I have amended? must you have amended? must she 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 she have been amending? must we have been amending? must you have been amending? must they have been amending?
Interro-negative form
Simple form
mustn't I amend? mustn't you amend? mustn't she amend? mustn't we amend? mustn't you amend? mustn't they amend?
V-ing form
mustn't I be amending? mustn't you be amending? mustn't she be amending? mustn't we be amending? mustn't you be amending? mustn't they be amending?
Perfect
mustn't I have amended? mustn't you have amended? mustn't she have amended? mustn't we have amended? mustn't you have amended? mustn't they have amended?
V-ing perfect
mustn't I have been amending? mustn't you have been amending? mustn't she have been amending? mustn't we have been amending? mustn't you have been amending? mustn't they have been amending?