English verb conjugation
CAN TRAIN

Regular verb: train - trained - trained

Affirmation

Simple form	V-ing form
I can train you can train he can train we can train you can train they can train	I can be training you can be training he can be training we can be training you can be training they can be training
Perfect	V-ing perfect
I can have trained you can have trained he can have trained we can have trained you can have trained they can have trained	I can have been training you can have been training he can have been training we can have been training you can have been training they can have been training

Negation

Simple form	V-ing form
I cannot train you cannot train he cannot train we cannot train you cannot train they cannot train	I cannot be training you cannot be training he cannot be training we cannot be training you cannot be training they cannot be training
Perfect	V-ing perfect
I cannot have trained you cannot have trained he cannot have trained we cannot have trained you cannot have trained they cannot have trained	I cannot have been training you cannot have been training he cannot have been training we cannot have been training you cannot have been training they cannot have been training

Interrogative form

Simple form	V-ing form
can I train? can you train? can he train? can we train? can you train? can they train?	can I be training? can you be training? can he be training? can we be training? can you be training? can they be training?
Perfect	V-ing perfect
can I have trained? can you have trained? can he have trained? can we have trained? can you have trained? can they have trained?	can I have been training? can you have been training? can he have been training? can we have been training? can you have been training? can they have been training?

Interro-negative form

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