Final answer:
Free morphemes are standalone linguistic units that can convey meaning. They often serve as function words such as pronouns, prepositions, conjunctions, and articles. While their form is static, the function they serve can change from sentence to sentence, playing an important role in sentence structure and meaning.
Step-by-step explanation:
A free morpheme is the smallest unit of language that can stand alone and convey meaning.
Unlike bound morphemes, which cannot stand independently and must be attached to other morphemes, free morphemes are complete words. Many free morphemes function as function words, playing crucial roles in the syntax of a sentence rather than conveying concrete images or ideas. Examples of function words include pronouns (them), prepositions (in), conjunctions (and), and articles (the).
These do not denote objects or actions but are used to construct sentences, indicating relationships between other words or framing the grammatical structure.
Recognizing the function of a word in a sentence is vital, as the form of a word doesn't always determine its role. For instance, while eating is usually a verb, it functions nominally in 'Eating an apple a day can keep the doctor away.' Similarly, pronouns can sometimes function adjectivally, as in 'That car is mine,' where that modifies the noun car.
Because language is a complex system of semantics and syntax, understanding how words like function words fit within this system is essential. Function words are often overlooked but are critical to sentence structure and meaning.