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