the 3 marking particles in Korean

1.이/가 SUBJECT MARKER

If you have a question or difficulties comment down below------The subjective marker -이/가 is used to indicate that the preceding noun phrase is the subject of the sentence. -가 is used after a word which ends with a vowel, while -이 is used after a consonant. For example if the noun is 사과 which ends with vowel (와) then we use 가, so it becomes 사과가. Similarly when the preceding noun ends with consonant as in 수박, we use 이, and thus it becomes 수박이.
사과가 너무 비싸요.

Apple is too expensive.

수박이 너무 싸요.

Water melon is so cheap.

Few other examples:

고양이가 집 뒤에 있다.

The cat is behind the house.

날씨가 좋네요.

The weather is good.

이름이 뭐예요 ?

What is your name ?

2.은/는 TOPIC MARKER

Korean particle 은 or 는 marks preceding word(s) as a topic of the sentence. The use of 은/는 is somewhat similar to a subject marking particle 이/가 but there is subtle difference between 은/는 and 이/가. In a very rough sense, a word followed by 은/는 has more attention than that followed by 이/가.
은 is used when the preceding word ends with a consonant and 는 is used when the preceding word ends with a vowel. For example if the word is 사과 which ends with a vowel (와) then we use 는, so it becomes 사과는. Similarly when the preceding word ends with a consonant as in 수박, we use 은, and thus it becomes 수박은.

The followings are the examples of 은/는 used in various situation as a topic marking particle.

이 김치는 너무 매워요.

This Kimchi is too spicy.

참기름은 안 샀어?

Didn't you buy sesame oil ?

한국말은 재미있어요.

3.을/를 OBJECT MARKER 

In general, 을 or 를 marks preceding noun(s) as an object of the sentence. 을 is used when the preceding noun ends with a consonant and 를 is used when the preceding noun ends with a vowel. For example if the noun is 사과 which ends with a vowel (와) then we use 를, so it becomes 사과를. Similarly when the preceding noun ends with a consonant as in 수박, we use 을, and thus it becomes 수박을.
Some examples:

버스를 놓쳤어요.

I missed the bus.

아이팟을 샀어요.

I bought an I-pad.

I POST MORE LEARNING KOREAN PLS SUBSCRIBE FOR MORE...