Sen Gitmak

ben getim

Sen getsin

Is this right?

No, it´s not correct.

The verb gitmek = to go

Present continuous tense: gidiyorum = I am going

Past tense: gittim = I went

Future tense: gideceğim = I will go.

Click here for a link to many other tenses conjugated for gitmek

Then, why did we use ´r´?

´r´? Could you try to be clearer.