We have eight parts of speech, such as:
Noun: John lives in Australia.
Pronoun: He has two brothers and one sister.
Verb: John left his city and traveled to study.
Adjective: He is a brave student; he earned a scholarship.
Adverb: He is a friendly person.
Preposition: From the other side, he was so upset about living alone.
Conjunction: But John decided to make friends and join foreign clubs.
Interjection: Wow! so nice.