N이에요. N예요.

1. It is a predicate that is used to ask and answer a subject's condition or attribute in informal Situation and used after nouns.

2. You can combine '이에요.' with a noun that has 'Batchim'.
 1) 저는 지영이에요. ( I am Ji-young.)
 2) 지영은 한국 사람이에요. (Ji-young is Korean.)
 3) 규연은 군인이에요. (Gyu-yeon is a soldier.)

3. You can combine '예요.' with a noun that has not 'Batchim'.
 1) 저는 중기예요. ( I'm Joong-gi.)
 2) 시진은 기자예요. (Shi-jin is a reporter.)

4. The form of a declarative sentence and an interrogative sentence is the same.
If you raise the end of the sentence, it becomes an interrogative sentence and if you lower the end of the sentence, it becomes a declarative statement.
 1) 명주는 학생이에요.  ( Myung-Joo is a student.)
 2) 명주는 학생이에요? ( Is Myung-joo a student?)

N는, N은

1. The grammar used to express the subject of a sentence and it is used after the noun.

2. A noun without a Batchim is followed by a combination of '는'.

   저는, 나는 ( I )

   너는 (you) 

   그는 (he)

   영수는 (Young soo)

   중기는 (Joong gi)

3. A noun with a Batchim is followed by a combination of '은'.

   그들은 (They)

   지영은 (Ji Young)

   시진은 (Shi Jin)

N 씨, N 님

1. It is an expression to use as a person's title, and to express the person who is polite.
   시진 씨 (Mr. Shi Jin)
   지영 씨 (Ms. Ji Young)
   명주 씨 (Ms. Myung Joo)
   리차드 씨 ( Mr. Richard)

2. 'N 님' is a polite expression than 'N 씨'.
   시진 님 (Mr. Shi Jin)
   지영 님 (Ms. Ji Young)
   명주 님 (Ms. Myung Joo)
   리차드 님 ( Mr. Richard)

Features of Hangul

1) Hangul reads in order of be written.

2) Korean has only one sound per letter.

3) Korean use only one vowel per one letter.

4) Left -> Right: Consonant on the left + Vowel on the right
  The vowels of the 'ㅏ, ㅑ, ㅓ, ㅕ, ㅣ' series has consonants come to the left of vowel.
  ex) 가,  야,  너,  며,  비  

5) Above -> Below: Consonant be used above of Vowel.
  The vowels of the 'ㅗ, ㅛ, ㅜ, ㅠ, ㅡ' series has consonant come to the top of vowel.
  ex)  도,  교,  수,  유,  크

6) Left -> right -> down : Consonant on the left, vowel on the right and other consonant be beneath them. 
  ex) 강,  약,  먼,  형,  빗

7) Above -> middle -> below: It has consonant above, vowel in the middle and a consonant be beneath them.
  ex)  곰, 욕, 눈, 융, 흠 

8) Left -> Right -> Below (2 consonants): It has Consonant on the left, vowels on the right, and two consonants below it. And the two consonants below are left and right.
  ex) 닭,  넋,  밝

9) Above -> middle -> below (2 consonants): It has consonant above, vowel in the middle and a two consonant be beneath them. The two consonants below are on the left and right.
  ex) 몫, 흙

10) The consonants that after the vowel in Hangul are all called 'batchim'.