전화하다([jeon-hwa-ha-da/call]) means to make a phone call. In polite speech, say 전화해요([jeon-hwa-hae-yo]).
전화했어요([jeon-hwa-hae-sseo-yo/called]) is the polite past form. Example: 엄마한테 전화했어요 (I called mom).
전화해야 해요([jeon-hwa-hae-ya hae-yo/have to call]) means you must call. Example: 지금 전화해야 해요 (I have to call now).
전화하다([jeon-hwa-ha-da/call]) means "to call". It is used when you make a phone call to someone.
1. Daily: “친구한테 전화해요 (chin-gu-han-te jeon-hwa-hae-yo)”
2. Past: 전화했어요([jeon-hwa-hae-sseo-yo/called]) called.
3. Duty: 전화해야 해요([jeon-hwa-hae-ya hae-yo/have to call]) have to call.
4. Warning: 전화하지 마세요([jeon-hwa-ha-ji ma-se-yo/don't call]) don't call.
A: Who do you call?
B: 친구한테 전화해요. B: chin-gu-han-te jeon-hwa-hae-yo.B: I call my friend.
A: 왜 전화해요? A: wae jeon-hwa-hae-yo?A: Why do you call?
B: 물어보려고 전화해요. B: mu-reo-bo-ryeo-go jeon-hwa-hae-yo.B: I call to ask something. - 전화하다([jeon-hwa-ha-da/call])
A: Did you call yesterday?
B: 네, 전화했어요. B: ne, jeon-hwa-hae-sseo-yo.B: Yes, I called.
A: 누구한테 전화했어요? A: nu-gu-han-te jeon-hwa-hae-sseo-yo?A: Who did you call?
B: 엄마한테 전화했어요. B: eom-ma-han-te jeon-hwa-hae-sseo-yo.B: I called mom. - 전화했어요([jeon-hwa-hae-sseo-yo/called])
A: When do you have to call?
B: 지금 전화해야 해요. B: ji-geum jeon-hwa-hae-ya hae-yo.B: I have to call now.
A: 누구한테 전화해야 해요? A: nu-gu-han-te jeon-hwa-hae-ya hae-yo?A: Who do you have to call?
B: 사장님한테 전화해야 해요. B: sa-jang-ni-man-te jeon-hwa-hae-ya hae-yo.B: I have to call the boss. - 전화해야 해요([jeon-hwa-hae-ya hae-yo/have to call])
• 전화하다([jeon-hwa-ha-da/call]) call
- 전화했어요([jeon-hwa-hae-sseo-yo/called]) called
- 전화하고 싶어요([jeon-hwa-ha-go si-peo-yo/want to call]) want to call
- 전화해야 해요([jeon-hwa-hae-ya hae-yo/have to call]) have to call
- 전화하지 마세요([jeon-hwa-ha-ji ma-se-yo/don't call]) don't call