must train
Regular verb: train - trained- trained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must train
you must train
she must train
we must train
you must train
they must train 	I must be training
you must be training
she must be training
we must be training
you must be training
they must be training	I must have trained
you must have trained
she must have trained
we must have trained
you must have trained
they must have trained	I must have been training
you must have been training
she must have been training
we must have been training
you must have been training
they must have been training	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't train
you mustn't train
she mustn't train
we mustn't train
you mustn't train
they mustn't train 	I mustn't be training
you mustn't be training
she mustn't be training
we mustn't be training
you mustn't be training
they mustn't be training	I mustn't have trained
you mustn't have trained
she mustn't have trained
we mustn't have trained
you mustn't have trained
they mustn't have trained	I mustn't have been training
you mustn't have been training
she mustn't have been training
we mustn't have been training
you mustn't have been training
they mustn't have been training	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I train?
must you train?
must she train?
must we train?
must you train?
must they train? 	must I be training?
must you be training?
must she be training?
must we be training?
must you be training?
must they be training? 	must I have trained?
must you have trained?
must she have trained?
must we have trained?
must you have trained?
must they have trained? 	must I have been training?
must you have been training?
must she have been training?
must we have been training?
must you have been training?
must they have been training? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I train?
mustn't you train?
mustn't she train?
mustn't we train?
mustn't you train?
mustn't they train? 	mustn't I be training?
mustn't you be training?
mustn't she be training?
mustn't we be training?
mustn't you be training?
mustn't they be training? 	mustn't I have trained?
mustn't you have trained?
mustn't she have trained?
mustn't we have trained?
mustn't you have trained?
mustn't they have trained? 	mustn't I have been training?
mustn't you have been training?
mustn't she have been training?
mustn't we have been training?
mustn't you have been training?
mustn't they have been training?