들어가다([deu-reo-ga-da/enter]) is the basic verb for moving from outside to inside. In polite speech, say 들어가요([deu-reo-ga-yo]).
들어갔어요([deu-reo-ga-sseo-yo/entered]) is the polite past form of 들어가다. Example: 방에 들어갔어요 (I entered the room).
들어가야 해요([deu-reo-ga-ya hae-yo/have to enter]) means you must enter. Example: 빨리 들어가야 해요 (I have to enter quickly).
들어가다([deu-reo-ga-da/enter]) means "to enter / go in". It is used when moving from outside to inside.
1. Move: “방에 들어가요 (bang-e deu-reo-ga-yo)”
2. Past: 들어갔어요([deu-reo-ga-sseo-yo/entered]) entered.
3. Duty: 들어가야 해요([deu-reo-ga-ya hae-yo/have to enter]) have to enter.
4. Warning: 들어가지 마세요([deu-reo-ga-ji ma-se-yo/don't enter]) don't enter.
A: Where do you enter?
B: 방에 들어가요. B: bang-e deu-reo-ga-yo.B: I enter a room.
A: 사무실에 들어가요? A: sa-mu-si-re deu-reo-ga-yo?A: Do you enter the office?
B: 네, 사무실에 들어가요. B: ne, sa-mu-si-re deu-reo-ga-yo.B: Yes, I enter the office. - 들어가다([deu-reo-ga-da/enter])
A: Did you enter the room?
B: 네, 들어갔어요. B: ne, deu-reo-ga-sseo-yo.B: Yes, I entered.
A: 언제 들어갔어요? A: eon-je deu-reo-ga-sseo-yo?A: When did you enter?
B: 조금 전에 들어갔어요. B: jo-geum jeo-ne deu-reo-ga-sseo-yo.B: I entered a little while ago. - 들어갔어요([deu-reo-ga-sseo-yo/entered])
A: Do you have to enter now?
B: 네, 들어가야 해요. B: ne, deu-reo-ga-ya hae-yo.B: Yes, I have to enter.
A: 왜 들어가야 해요? A: wae deu-reo-ga-ya hae-yo?A: Why do you have to enter?
B: 회의가 있어서 들어가야 해요. B: hoe-ui-ga i-sseo-seo deu-reo-ga-ya hae-yo.B: I have to enter because of a meeting. - 들어가야 해요([deu-reo-ga-ya hae-yo/have to enter])
• 들어가다([deu-reo-ga-da/enter]) enter / go in
- 들어갔어요([deu-reo-ga-sseo-yo/entered]) entered
- 들어가고 싶어요([deu-reo-ga-go si-peo-yo/want to enter]) want to enter
- 들어가야 해요([deu-reo-ga-ya hae-yo/have to enter]) have to enter
- 들어가지 마세요([deu-reo-ga-ji ma-se-yo/don't enter]) don't enter