Word forms refer to the different variations of a word that can change its meaning or grammatical function. For example, the word run can appear as running, ran, or runner, each serving a unique purpose in a sentence. Understanding these forms helps us use words correctly in different contexts, whether we are writing or speaking. In English, word forms can include nouns, verbs, adjectives, and adverbs. For instance, the adjective happy can change to the adverb happily or the noun happiness. By mastering word forms, we enhance our language skills and improve our ability to express ideas clearly and effectively.