must opine
Regular verb: opine - opined- opined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must opine
you must opine
he must opine
we must opine
you must opine
they must opine 	I must be opining
you must be opining
he must be opining
we must be opining
you must be opining
they must be opining	I must have opined
you must have opined
he must have opined
we must have opined
you must have opined
they must have opined	I must have been opining
you must have been opining
he must have been opining
we must have been opining
you must have been opining
they must have been opining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't opine
you mustn't opine
he mustn't opine
we mustn't opine
you mustn't opine
they mustn't opine 	I mustn't be opining
you mustn't be opining
he mustn't be opining
we mustn't be opining
you mustn't be opining
they mustn't be opining	I mustn't have opined
you mustn't have opined
he mustn't have opined
we mustn't have opined
you mustn't have opined
they mustn't have opined	I mustn't have been opining
you mustn't have been opining
he mustn't have been opining
we mustn't have been opining
you mustn't have been opining
they mustn't have been opining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I opine?
must you opine?
must he opine?
must we opine?
must you opine?
must they opine? 	must I be opining?
must you be opining?
must he be opining?
must we be opining?
must you be opining?
must they be opining? 	must I have opined?
must you have opined?
must he have opined?
must we have opined?
must you have opined?
must they have opined? 	must I have been opining?
must you have been opining?
must he have been opining?
must we have been opining?
must you have been opining?
must they have been opining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I opine?
mustn't you opine?
mustn't he opine?
mustn't we opine?
mustn't you opine?
mustn't they opine? 	mustn't I be opining?
mustn't you be opining?
mustn't he be opining?
mustn't we be opining?
mustn't you be opining?
mustn't they be opining? 	mustn't I have opined?
mustn't you have opined?
mustn't he have opined?
mustn't we have opined?
mustn't you have opined?
mustn't they have opined? 	mustn't I have been opining?
mustn't you have been opining?
mustn't he have been opining?
mustn't we have been opining?
mustn't you have been opining?
mustn't they have been opining?