Ellipsis and substitution show the degree of formality, the amount of information repeated, and the type of relationship between the writer and the reader. In Portuguese, choosing to omit, repeat, or substitute a term signals clarity, closeness, conciseness, or precision, and this choice depends on the register required by the context. Brazilian Portuguese tolerates more subject omission than European Portuguese, but clarity remains the central criterion in formal contexts.

Pronominal ellipsis occurs when the referent is implicit and does not need to be retrieved by an explicit pronoun. It is frequent in informal speech and everyday conversation, because it saves words and maintains the natural rhythm of interaction. In formal texts, excessive omission can create ambiguity, especially when there are several possible referents.

Nominal ellipsis occurs when a name mentioned previously is not repeated and remains implicit in the following utterance. It appears strongly in journalistic and literary texts because it allows conciseness, fluency, and rapid reintroduction of information already known. In administrative and legal registers, the preference is for explicit reference to avoid doubts about the referent’s identity.

Verbal ellipsis omits the verb when it is already recovered by the syntactic or discourse context. This resource is common in lists, short responses, and coordinated sequences, because it reduces redundancy without compromising reading when the structure is transparent. In academic style, verbal suppression should be used with care so as not to weaken the precision of the argumentation.

Substitution retrieves an earlier element by a pronoun or equivalent expression, rather than leaving it entirely implicit. In academic, journalistic and administrative texts, it helps preserve the reference with more precision than pure ellipsis. The choice between repeating and substituting depends on the distance between mentions and the risk of ambiguity.

In conversation, ellipsis and substitution work together to maintain fluency without losing the basic reference. Expressions like he, she and that appear frequently, but they can become vague if the context has many participants or alternating topics. Therefore, everyday speech allows greater omissions, while clarity depends on the immediate pragmatic surroundings.

In academic writing, the precision of reference tends to be more important than extreme economy. Replacing with pronouns is used moderately, and nominal repetition can be preferred when there is a risk of ambiguity among authors, concepts or data. This balance relates to care with Style and also affects the reading of Indirect Style.

In journalism, ellipsis and substitution serve to give rhythm, avoid excessive repetition, and organize information quickly. The retrieval must be sufficiently clear so that the reader recovers the referent without effort, even in short and dense texts. The main value is informational concision, not absolute stylistic neutrality.

In literary text, ellipsis can be an effect, not only a matter of economy. Syntactic silence, the breaking of expectation, and the omission of terms create atmosphere, suspense or interiority. Substitution can also be manipulated to guide narrative focus and highlight voices, memories, or ambiguities.

In administrative and legal texts, the priority is to avoid ambiguous ellipses and use explicit substitutions whenever interpretation could vary. Controlled repetition of names, positions, parties and legal objects reduces the risk of error and improves documentary traceability. Pronominal placement and the choice of reference retrieval should also respect the norms of the genre, because formal precision depends on form and reference.

The decision between omitting and substituting depends on the balance between clarity and conciseness. When there is a single predictable referent, ellipsis can make the text lighter; when there is competition among referents, explicit substitution reduces interpretive error. The differences between Brazilian Portuguese and European Portuguese, and also between proclisis, enclisis and other pronoun placement preferences, affect how this choice appears on the surface of the text.

The most frequent errors arise when using a pronoun as automatic substitute and forgetting that the reference must remain identifiable. Another error is maintaining a typical conversation ellipsis in a text that requires administrative, academic, or legal precision. It is also common to ignore that the choice between repeating and substituting depends on the pronoun’s position, the local norm, and the expected clarity effect of the genre.