1. Noun
   1. Types of Noun
      1. Countable
      2. Uncountable
   2. Number of Noun
      1. Singular
      2. Plural
   3. Determiner
      1. Article
      2. Demonstrative
      3. Numeral
      4. Possessive
      5. Genitive
      6. " other " Group
      7. Quantifier
2. Pronoun
3. Interjection