The interjection is a part of speech which is more commonly used in informal language than in formal writing or speech. Basically, the function of interjections is to express emotions or sudden bursts of feelings. They can express a wide variety of emotions such as: excitement, joy, surprise, or disgust.
Prepositions are very common words. Seven of them are in the top 20 words in English. Prepositions link a word to another part of the sentence and tell us what the relationship is, for example in space or time.
An adjective is a part of speech which describes, identifies, or quantifies a noun or a pronoun. So basically, the main function of an adjective is to modify a noun or a pronoun so that it will become more specific and interesting. Instead of just one word, a group of words with a subject and a verb, can also function as an adjective. When this happens, the group of words is called an adjective clause.
A verb can be considered as one of the most important parts of a sentence. You probably already know that a sentence must be composed of a subject and a predicate, so what makes a verb so important? Well, the verb is the main component of a predicate. Without it, there won’t be a sentence, just a bunch of words with an incomplete thought. Simply defined, the verb is a part of speech which is used to demonstrate an action or a state of being.
For you to understand the concept easily, you can look at nouns as actors and pronouns as stuntmen in movies. When a stuntman takes the place of an actor for a particular scene, he represents the same character. Just the same, a pronoun replaces a noun in a particular sentence, but it still refers to the same noun.