G08. Synthesis 1 -아서/어서/해서: 이유 말하기 Tell reason

Step 01. Read and Learn Patterns

배가 아파서 병원에 갔어요. I went to the hospital because I had stomach ache.
늦게 일어나서 아침을 못 먹었어요? Couldn't you have breakfast because you woke up late?
일이 많아서 요즘 피곤해요. I am tired because there are many work (to do).
시험을 잘 봐서 기분이 좋아요. I feel good because I did at the exam well.
늦어서 미안해요. Sorry for being late.
보고 싶어서 연락했어요. I contacted you because I missed you.
도와줘서 고마워요. Thank you for helping me.
제가 약속을 잊어버려서 친구가 화가 많이 났어요. My friend got very angry because I forgot the appointment.
한국 노래를 좋아해서 한국어를 배워요. I learn Korean because I like K-pop.
춤도 노래도 잘 해서 그 가수를 좋아해요. I like that singer because he/she does sing and dance well.
방이 깨끗해서 마음에 들어요. I like very much because the room is clean.
오빠 생일이라서(or 생일이여서) 선물을 샀어요. I bought the present because it's the brother's birthday.
가수라서(or 가수여서) 노래를 잘 해요. He/she sings well because he/she is a singer.

Step 02. Learn words and grammars

Words

배가 아프다 have stomach ache, 늦게  late, 일어나다 get up/ wake up, 아침을 먹다 have breakfast, 피곤하다 be tired, 시험을 잘 보다 do at the exam well, 기분이 좋다 feel good, 늦다 be late, 보고 싶다 miss, 연락하다 contact, 도와주다 help (me), 약속 appointment, 잊어버리다 totally forget, 화가 나다 get angry, 깨끗하다 be clean, 마음에 들다 like very much

Grammars

Action Verb/Descriptive verb + -아서/어서/해서:
⠂It indicates that the part ① is the reason or cause of the part ②. 
⠂It can use for question or statement type of sentences. For requesting/suggesting sentences, you should use '-(으)니까' instead.
⠂-아서/어서/해서 can't combine with the past particle '-았/었/였(했)-'. Its sentence tense is determined by the part ② tense.

Step 03. Practice and make your own sentence.

1. I couldn't wake up early because I was too tired.
2. I feel bad because I couldn't do well at the exam.
3. I forget the appointment because I was too busy.
4. Because it's my friend's birthday, I contacted her.
(helping words: early 일찍)