Intermediate Korean Grammar: Verb + 고 해서

The meaning of 고 해서 is almost the same as 아/어서, but more detailed than 아/어서.

When to use 아/어서:

One reason only (for example, hungry) + 아/어 서

Sentence: 배가 고파서 라면을 먹었어요. I ate ramen because I was hungry.

When to use V + 고 해서:

The most important reason out of many reasons why I ate ramen + 고 해서

Reason 1) 라면을 좋아해요. I like ramen.
Reason 2) 라면 값이 싸요. Ramen is cheap. (most important reason)
Reason 3) 배가 고파요. I am hungy.
Reason 4) 라면이 맛있어요. Ramen tastes good.
Reason 5) ...

Sentence: 라면 값도 싸고 해서 라면을 먹었어요. I ate ramen because ramen is cheap.

Like 아/어서, when 고 해서 is used, sentence must end with ~습니다 (~요), ~습니까? (~요?) ending form.
Like (으)니까 when 고 하니까 is used, sentence must end with ~ㅂ시다, ~(으)세요 ending form.

Difference between 끝나다 and 끝내다

Something (Noun) 이/가 + 끝나다 = something is finished
Something (Noun) 을/를 + 끝내다 = to let something finish

1. Noun + 이/가 끝나다

Note: Thing is the subject here

Examples:
수업이 끝나다. Class is finish.
일이 끝났어요. Work is finished.
시랑이 끝났어요. Love is finished.

2. Noun + 을/를 끝내다

Note: Person is the subject here, and thing is the object.

Examples:
선생님이 수업을 끝내요. Teacher end the class.
저는 일을 끝냈어요. I finished work.
남자가 사랑을 끝내요. Guy stop loving you.

시간이 정말 빨리 가네!

Omg how time flies! April 2014 marks the 7th year of my korean language study. Still totally suck at conversing in Korean. Sigh.