must conjecture
Regular verb: conjecture - conjectured- conjectured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must conjecture
you must conjecture
she must conjecture
we must conjecture
you must conjecture
they must conjecture 	I must be conjecturing
you must be conjecturing
she must be conjecturing
we must be conjecturing
you must be conjecturing
they must be conjecturing	I must have conjectured
you must have conjectured
she must have conjectured
we must have conjectured
you must have conjectured
they must have conjectured	I must have been conjecturing
you must have been conjecturing
she must have been conjecturing
we must have been conjecturing
you must have been conjecturing
they must have been conjecturing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't conjecture
you mustn't conjecture
she mustn't conjecture
we mustn't conjecture
you mustn't conjecture
they mustn't conjecture 	I mustn't be conjecturing
you mustn't be conjecturing
she mustn't be conjecturing
we mustn't be conjecturing
you mustn't be conjecturing
they mustn't be conjecturing	I mustn't have conjectured
you mustn't have conjectured
she mustn't have conjectured
we mustn't have conjectured
you mustn't have conjectured
they mustn't have conjectured	I mustn't have been conjecturing
you mustn't have been conjecturing
she mustn't have been conjecturing
we mustn't have been conjecturing
you mustn't have been conjecturing
they mustn't have been conjecturing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I conjecture?
must you conjecture?
must she conjecture?
must we conjecture?
must you conjecture?
must they conjecture? 	must I be conjecturing?
must you be conjecturing?
must she be conjecturing?
must we be conjecturing?
must you be conjecturing?
must they be conjecturing? 	must I have conjectured?
must you have conjectured?
must she have conjectured?
must we have conjectured?
must you have conjectured?
must they have conjectured? 	must I have been conjecturing?
must you have been conjecturing?
must she have been conjecturing?
must we have been conjecturing?
must you have been conjecturing?
must they have been conjecturing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I conjecture?
mustn't you conjecture?
mustn't she conjecture?
mustn't we conjecture?
mustn't you conjecture?
mustn't they conjecture? 	mustn't I be conjecturing?
mustn't you be conjecturing?
mustn't she be conjecturing?
mustn't we be conjecturing?
mustn't you be conjecturing?
mustn't they be conjecturing? 	mustn't I have conjectured?
mustn't you have conjectured?
mustn't she have conjectured?
mustn't we have conjectured?
mustn't you have conjectured?
mustn't they have conjectured? 	mustn't I have been conjecturing?
mustn't you have been conjecturing?
mustn't she have been conjecturing?
mustn't we have been conjecturing?
mustn't you have been conjecturing?
mustn't they have been conjecturing?