I know that Koreans do not use the word "I" in their speech. What word do they use in place of that. Like "I was going to the store."
"I was going for a run."
I have seen some use the word "naega" or at the end of a sentence, "imnida."
I'm assuming you know that "갔다" is go in pastense (went).
You can use "I" as "naega", but it is implied often times, so you would just sort of say "store went" when translated literally into English. If you do want to use "naega", you should put it at the beginning of the sentence.
They do use "I" in their speech...