have been + ~ing

I have been thinking about you 네 생각만 해오고 있어 예문 Have you been waiting long ? Scientists have been studying dolphins for 30 years.

I have been working since January. I have been singing a lot of songs.

교정 받은 표현 I'm working today => I'm worked today. working 이라고 하면 지금까지도 일하고 있는 줄 앎(과거형 말하기가 왜이리 어려울까..) I am come back to my home.

(그냥 봐도 이상한 문장이네..) => I came back to my home.

그냥 쉬었어 표현 할 때 => I just .....