must turn
Regular verb: turn - turned- turned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must turn
you must turn
he must turn
we must turn
you must turn
they must turn 	I must be turning
you must be turning
he must be turning
we must be turning
you must be turning
they must be turning	I must have turned
you must have turned
he must have turned
we must have turned
you must have turned
they must have turned	I must have been turning
you must have been turning
he must have been turning
we must have been turning
you must have been turning
they must have been turning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not turn
you must not turn
he must not turn
we must not turn
you must not turn
they must not turn 	I must not be turning
you must not be turning
he must not be turning
we must not be turning
you must not be turning
they must not be turning	I must not have turned
you must not have turned
he must not have turned
we must not have turned
you must not have turned
they must not have turned	I must not have been turning
you must not have been turning
he must not have been turning
we must not have been turning
you must not have been turning
they must not have been turning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I turn?
must you turn?
must he turn?
must we turn?
must you turn?
must they turn? 	must I be turning?
must you be turning?
must he be turning?
must we be turning?
must you be turning?
must they be turning? 	must I have turned?
must you have turned?
must he have turned?
must we have turned?
must you have turned?
must they have turned? 	must I have been turning?
must you have been turning?
must he have been turning?
must we have been turning?
must you have been turning?
must they have been turning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not turn?
must you not turn?
must he not turn?
must we not turn?
must you not turn?
must they not turn? 	must I not be turning?
must you not be turning?
must he not be turning?
must we not be turning?
must you not be turning?
must they not be turning? 	must I not have turned?
must you not have turned?
must he not have turned?
must we not have turned?
must you not have turned?
must they not have turned? 	must I not have been turning?
must you not have been turning?
must he not have been turning?
must we not have been turning?
must you not have been turning?
must they not have been turning?