Elliptical structures are used to shorten sentences by removing words with repeated meanings, such as subjects and verbs, without changing the overall meaning. This allows sentences to have a better structure while being more concise. Elliptical structures are commonly used in both spoken and written language. There are three main types of ellipsis: positive, negative, and contrary. Positive ellipsis uses words like "too" or "so" to join sentences with repeated predicates, while negative ellipsis uses words like "either" or "neither". Contrary ellipsis uses words like "but" to connect sentences with opposing meanings. Elliptical structures are an important part of the Indonesian language.