English verb conjugation
MUST TRAIN

Regular verb: train - trained - trained

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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
I must not train you must not train she 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 she 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 she 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 she 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 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?
Perfect	V-ing perfect
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
must I not train? must you not train? must she 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 she 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 she 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 she not have been training? must we not have been training? must you not have been training? must they not have been training?