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