-어(-어?)

V/Adj/이다,아니다 + 어/아(어?/아?) 1. This indicates that the sentence is declarative(questioning) and informal. This form created by removing '-요' from the '-아요/어요' form.

나는 학교에 가.

I'm going to school.

너는 정말 예뻐.

You are really pretty.

날씨가 어때?

How's the weather?

이것은 책상이야.

This is a desk.

'N+이에요' (When the noun's last letter has a 받침) changes to 'N+이야'.

이것은 의자야.

This is a chair.

'N+예요' (When the noun's last letter has no 받침) changes to 'N+야'.

V + 아/어 2. This indicates that the sentence is propositive and informal.

이 영화 너무 웃겨. 나랑 같이 봐.

This movie is so funny. Let’s watch it with me.

나 수지랑 일본에 갈 거야. 너도 같이 가.

I'm going to Japan with Suzy. Come with me too.

V + 아/어 3. This indicates that the sentence is imperative and informal.

다같이 뛰어!

Everyone, run!

도와줘.

help me.

청소해.

Clean up.