English verb conjugation
MUST TRAIN

Regular verb: train - trained - trained

Affirmation

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