must retune
Regular verb: retune - retuned- retuned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must retune
you must retune
he must retune
we must retune
you must retune
they must retune 	I must be retuning
you must be retuning
he must be retuning
we must be retuning
you must be retuning
they must be retuning	I must have retuned
you must have retuned
he must have retuned
we must have retuned
you must have retuned
they must have retuned	I must have been retuning
you must have been retuning
he must have been retuning
we must have been retuning
you must have been retuning
they must have been retuning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not retune
you must not retune
he must not retune
we must not retune
you must not retune
they must not retune 	I must not be retuning
you must not be retuning
he must not be retuning
we must not be retuning
you must not be retuning
they must not be retuning	I must not have retuned
you must not have retuned
he must not have retuned
we must not have retuned
you must not have retuned
they must not have retuned	I must not have been retuning
you must not have been retuning
he must not have been retuning
we must not have been retuning
you must not have been retuning
they must not have been retuning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I retune?
must you retune?
must he retune?
must we retune?
must you retune?
must they retune? 	must I be retuning?
must you be retuning?
must he be retuning?
must we be retuning?
must you be retuning?
must they be retuning? 	must I have retuned?
must you have retuned?
must he have retuned?
must we have retuned?
must you have retuned?
must they have retuned? 	must I have been retuning?
must you have been retuning?
must he have been retuning?
must we have been retuning?
must you have been retuning?
must they have been retuning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not retune?
must you not retune?
must he not retune?
must we not retune?
must you not retune?
must they not retune? 	must I not be retuning?
must you not be retuning?
must he not be retuning?
must we not be retuning?
must you not be retuning?
must they not be retuning? 	must I not have retuned?
must you not have retuned?
must he not have retuned?
must we not have retuned?
must you not have retuned?
must they not have retuned? 	must I not have been retuning?
must you not have been retuning?
must he not have been retuning?
must we not have been retuning?
must you not have been retuning?
must they not have been retuning?