Grammar

Noun

        A noun is a word that identifies a person, animal, place, thing, or idea.

examples

- the girl is at school

-the flowers are pink

Verb

       The verb signals an action, an occurrence, or a state of being.

Examples

-I buy a car 

-he cleans his bedroom 

Adjective

             Adjectives are words that describe or modify other words, making your writing and speaking much more specific, and a whole lot more interesting. 
Examples

-Today is a nice day

-The ball is big

adverb 
          Is a word that is used to change or qualify the meaning of an adjective, a verb, a clause, another adverb, or any other type of word or phrase with the exception of determiners and adjectives that directly modify nouns.
Example
- She always arrives early.
- He drives carefully.