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