Example; The Sun rises in the East.
The - article
Sun - noun
rises - verb
in - preposition
the - article
East - noun
Understanding parts of speech is essential for every learner to classify words in a sentence, which one is a noun, a verb, an adjective, an adverb, etc. Because it is a fundamental step in learning English. In the following sentence if the learners understand the parts of speech, they can classify it.