must opine
Regular verb: opine - opined- opined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must opine
you must opine
she must opine
we must opine
you must opine
they must opine 	I must be opining
you must be opining
she must be opining
we must be opining
you must be opining
they must be opining	I must have opined
you must have opined
she 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
she 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 must not opine
you must not opine
she must not opine
we must not opine
you must not opine
they must not opine 	I must not be opining
you must not be opining
she must not be opining
we must not be opining
you must not be opining
they must not be opining	I must not have opined
you must not have opined
she must not have opined
we must not have opined
you must not have opined
they must not have opined	I must not have been opining
you must not have been opining
she must not have been opining
we must not have been opining
you must not have been opining
they must not have been opining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I opine?
must you opine?
must she opine?
must we opine?
must you opine?
must they opine? 	must I be opining?
must you be opining?
must she be opining?
must we be opining?
must you be opining?
must they be opining? 	must I have opined?
must you have opined?
must she 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 she 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 	
must I not opine?
must you not opine?
must she not opine?
must we not opine?
must you not opine?
must they not opine? 	must I not be opining?
must you not be opining?
must she not be opining?
must we not be opining?
must you not be opining?
must they not be opining? 	must I not have opined?
must you not have opined?
must she not have opined?
must we not have opined?
must you not have opined?
must they not have opined? 	must I not have been opining?
must you not have been opining?
must she not have been opining?
must we not have been opining?
must you not have been opining?
must they not have been opining?