Theory:

In the English language, each sentence is made of words that are divided into different classes according to their forms and usage in a sentence. These are called parts of speech.
Any sentence will have a combination of some of the following parts. It is divided into eight types:
 
1. Nouns
2. Pronouns
3. Verbs
4. Adverbs
5. Adjectives
6. Prepositions
7. Conjunctions
8. Interjections.
 
Let us take a look at the first three parts - nouns, pronouns and verbs in detail.