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