must doctor
Regular verb: doctor - doctored- doctored

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must doctor
you must doctor
he must doctor
we must doctor
you must doctor
they must doctor 	I must be doctoring
you must be doctoring
he must be doctoring
we must be doctoring
you must be doctoring
they must be doctoring	I must have doctored
you must have doctored
he must have doctored
we must have doctored
you must have doctored
they must have doctored	I must have been doctoring
you must have been doctoring
he must have been doctoring
we must have been doctoring
you must have been doctoring
they must have been doctoring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't doctor
you mustn't doctor
he mustn't doctor
we mustn't doctor
you mustn't doctor
they mustn't doctor 	I mustn't be doctoring
you mustn't be doctoring
he mustn't be doctoring
we mustn't be doctoring
you mustn't be doctoring
they mustn't be doctoring	I mustn't have doctored
you mustn't have doctored
he mustn't have doctored
we mustn't have doctored
you mustn't have doctored
they mustn't have doctored	I mustn't have been doctoring
you mustn't have been doctoring
he mustn't have been doctoring
we mustn't have been doctoring
you mustn't have been doctoring
they mustn't have been doctoring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I doctor?
must you doctor?
must he doctor?
must we doctor?
must you doctor?
must they doctor? 	must I be doctoring?
must you be doctoring?
must he be doctoring?
must we be doctoring?
must you be doctoring?
must they be doctoring? 	must I have doctored?
must you have doctored?
must he have doctored?
must we have doctored?
must you have doctored?
must they have doctored? 	must I have been doctoring?
must you have been doctoring?
must he have been doctoring?
must we have been doctoring?
must you have been doctoring?
must they have been doctoring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I doctor?
mustn't you doctor?
mustn't he doctor?
mustn't we doctor?
mustn't you doctor?
mustn't they doctor? 	mustn't I be doctoring?
mustn't you be doctoring?
mustn't he be doctoring?
mustn't we be doctoring?
mustn't you be doctoring?
mustn't they be doctoring? 	mustn't I have doctored?
mustn't you have doctored?
mustn't he have doctored?
mustn't we have doctored?
mustn't you have doctored?
mustn't they have doctored? 	mustn't I have been doctoring?
mustn't you have been doctoring?
mustn't he have been doctoring?
mustn't we have been doctoring?
mustn't you have been doctoring?
mustn't they have been doctoring?