"Proč tam chceš jet?"

Translation: Why do you want to go there?

[garpike]

What's the difference between 'jet' and 'jít'?

[Lyn581999]

"Jet" is to go by means of some vehicle (car, train, tram, etc), while "jít" is to go on foot.

[BrianSille2]

... or by jet

[Diana694965]

No, by airplane is letět.

[GinaHearn4]

Is there a good definition of when to use 'jit' and when to use 'jet'? In English, I would just say that I have to go to work. Could it be either 'jit' or 'jet'?

[endless_sleeper]

See Lyn581999's answer to garpike above.