I learned more specific in this part of speech discussion, one thing i learned is how to use article sentence for example a, an, the. For example "Robert's friend has a cat and an apartment too, the cat often sleeps at Robert's place"
It's really useful for beginner and everyone who want to learning english. Including writing ( how to make sentence) and reading, typically nouns, adjectives, and prounous is a basic thing that is often studied. but in this part we also learn more, for example interjection, conjunction and preposition.