Word Class

Word class function

The function of a word class, also known as a part of speech, is to classify words according to their grammatical properties and the roles they play in sentences. By assigning words to different word classes, we can understand how they should be used in context and how they relate to other words in a sentence.

Each word class has its own unique set of characteristics and rules for usage, and understanding the function of word classes is essential for effective communication in English. Knowing our word classes allows us to create clear and grammatically correct sentences that convey our intended meaning.

Word classes in English

In English, there are four main word classes; nouns, verbs, adjectives, and adverbs. These are considered lexical words, and they provide the main meaning of a phrase or sentence.

The other five word classes are; prepositions, pronouns, determiners, conjunctions, and interjections. These are considered functional words, and they provide structural and relational information in a sentence or phrase.

Don't worry if it sounds a bit confusing right now. Read ahead and you'll be a master of the different types of word classes in no time!

The four main word classes

In the English language, there are four main word classes: nouns, verbs, adjectives, and adverbs. Let's look at all the word classes in detail.

Nouns

Nouns are the words we use to describe people, places, objects, feelings, concepts, etc. Usually, nouns are tangible (touchable) things, such as a table, a person, or a building.

However, we also have abstract nouns, which are things we can feel and describe but can't necessarily see or touch, such as love, honour, or excitement. Proper nouns are the names we give to specific and official people, places, or things, such as England, Claire, or Hoover.

Verbs

Verbs are words that show action, event, feeling, or state of being. This can be a physical action or event, or it can be a feeling that is experienced.

Lexical verbs are considered one of the four main word classes, and auxiliary verbs are not. Lexical verbs are the main verb in a sentence that shows action, event, feeling, or state of being, such as walk, ran, felt, and want, whereas an auxiliary verb helps the main verb and expresses grammatical meaning, such as has, is, and do.

Adjectives

Adjectives are words used to modify nouns, usually by describing them. Adjectives describe an attribute, quality, or state of being of the noun.

Fig 1. Adjectives can describe the woman and the dress

Adverbs

Adverbs are words that work alongside verbs, adjectives, and other adverbs. They provide further descriptions of how, where, when, and how often something is done.

All of the above examples are lexical word classes and carry most of the meaning in a sentence. They make up the majority of the words in the English language.

The other five word classes

The other five remaining word classes are; prepositions, pronouns, determiners, conjunctions, and interjections. These words are considered functional words and are used to explain grammatical and structural relationships between words.

For example, prepositions can be used to explain where one object is in relation to another.

Prepositions

Prepositions are used to show the relationship between words in terms of place, time, direction, and agency.

Pronouns

Pronouns take the place of a noun or a noun phrase in a sentence. They often refer to a noun that has already been mentioned and are commonly used to avoid repetition.

Chloe (noun) → she (pronoun)

Chloe's dog → her dog (possessive pronoun)

There are several different types of pronouns; let's look at some examples of each.

Determiners

Determiners work alongside nouns to clarify information about the quantity, location, or ownership of the noun. It 'determines' exactly what is being referred to. Much like pronouns, there are also several different types of determiners.

Conjunctions

Conjunctions are words that connect other words, phrases, and clauses together within a sentence. There are three main types of conjunctions;

• Coordinating conjunctions - these link independent clauses together.

• Subordinating conjunctions - these link dependent clauses to independent clauses.

• Correlative conjunctions - words that work in pairs to join two parts of a sentence of equal importance.

Interjections

Interjections are exclamatory words used to express an emotion or a reaction. They often stand alone from the rest of the sentence and are accompanied by an exclamation mark.

Word class: lexical classes and function classes

A helpful way to understand lexical word classes is to see them as the building blocks of sentences. If the lexical word classes are the blocks themselves, then the function word classes are the cement holding the words together and giving structure to the sentence.

Fig 2. Lexical and functional word classes

In this diagram, the lexical classes are in blue and the function classes are in yellow. We can see that the words in blue provide the key information, and the words in yellow bring this information together in a structured way.

Word class examples

Sometimes it can be tricky to know exactly which word class a word belongs to. Some words can function as more than one word class depending on how they are used in a sentence. For this reason, we must look at words in context, i.e. how a word works within the sentence. Take a look at the following examples of word classes to see the importance of word class categorisation.

Here we can see that the same word (bark) has a different meaning and different word class in each sentence. In the first example, 'bark' is used as a verb, and in the second as a noun (an object in this case).

In the first sentence, the word 'left' is used as a verb (an action), and in the second, it is used to modify the noun (foot). In this case, it is an adjective.

In this example, 'run' can be a verb or a noun.