Parts of speech

Take your dog as an example, dog is a noun and that she is sleeping it is a verb.
I am confused that what is noun and what is verb. 
NO
Do you know what is a pronoun?
And did you know that interjection is a word or phrase that is used to express surprise, pain, pleasure, etc. (for example Oh!, Hurray! or Wow!).
 It's a word that is used in place of a noun or a phrase that contains a noun.
Who can tell me what is an adverb?
 It's a word that is used in place of a noun or a phrase that contains a noun.
And the word up is a preposition like up in the sky.
This is a delicious  ice-cream.
Delicious is an adjective. Adjectives are a word that is used in place of a noun or a phrase that contains a noun.
They are  words that is used for joining other words, phrases or sentences.
Do you know the and you used are conjunctions. 
Bye and happy weekends!
Made  by Arisia, Anumegha and a Aliya.

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