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 must not train you must not train he must not train we must not train you must not train they must not train	I must not be training you must not be training he must not be training we must not be training you must not be training they must not be training
Perfect	V-ing perfect
I must not have trained you must not have trained he must not have trained we must not have trained you must not have trained they must not have trained	I must not have been training you must not have been training he must not have been training we must not have been training you must not have been training they must not 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
must I not train? must you not train? must he not train? must we not train? must you not train? must they not train?	must I not be training? must you not be training? must he not be training? must we not be training? must you not be training? must they not be training?
Perfect	V-ing perfect
must I not have trained? must you not have trained? must he not have trained? must we not have trained? must you not have trained? must they not have trained?	must I not have been training? must you not have been training? must he not have been training? must we not have been training? must you not have been training? must they not have been training?