must prognosticate
Regular verb: prognosticate - prognosticated- prognosticated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prognosticate
you must prognosticate
he must prognosticate
we must prognosticate
you must prognosticate
they must prognosticate 	I must be prognosticating
you must be prognosticating
he must be prognosticating
we must be prognosticating
you must be prognosticating
they must be prognosticating	I must have prognosticated
you must have prognosticated
he must have prognosticated
we must have prognosticated
you must have prognosticated
they must have prognosticated	I must have been prognosticating
you must have been prognosticating
he must have been prognosticating
we must have been prognosticating
you must have been prognosticating
they must have been prognosticating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not prognosticate
you must not prognosticate
he must not prognosticate
we must not prognosticate
you must not prognosticate
they must not prognosticate 	I must not be prognosticating
you must not be prognosticating
he must not be prognosticating
we must not be prognosticating
you must not be prognosticating
they must not be prognosticating	I must not have prognosticated
you must not have prognosticated
he must not have prognosticated
we must not have prognosticated
you must not have prognosticated
they must not have prognosticated	I must not have been prognosticating
you must not have been prognosticating
he must not have been prognosticating
we must not have been prognosticating
you must not have been prognosticating
they must not have been prognosticating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prognosticate?
must you prognosticate?
must he prognosticate?
must we prognosticate?
must you prognosticate?
must they prognosticate? 	must I be prognosticating?
must you be prognosticating?
must he be prognosticating?
must we be prognosticating?
must you be prognosticating?
must they be prognosticating? 	must I have prognosticated?
must you have prognosticated?
must he have prognosticated?
must we have prognosticated?
must you have prognosticated?
must they have prognosticated? 	must I have been prognosticating?
must you have been prognosticating?
must he have been prognosticating?
must we have been prognosticating?
must you have been prognosticating?
must they have been prognosticating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not prognosticate?
must you not prognosticate?
must he not prognosticate?
must we not prognosticate?
must you not prognosticate?
must they not prognosticate? 	must I not be prognosticating?
must you not be prognosticating?
must he not be prognosticating?
must we not be prognosticating?
must you not be prognosticating?
must they not be prognosticating? 	must I not have prognosticated?
must you not have prognosticated?
must he not have prognosticated?
must we not have prognosticated?
must you not have prognosticated?
must they not have prognosticated? 	must I not have been prognosticating?
must you not have been prognosticating?
must he not have been prognosticating?
must we not have been prognosticating?
must you not have been prognosticating?
must they not have been prognosticating?