摘要：Starting from Textual Linguistics, Discourse Analysis and studies on linguistic Norms, four essays are analyzed to show the problems of candidates with low grades and the good results of those who have improved their lexicon to better express their opinions. It is made an analysis of how the teacher can act in class, aiming at improving writing. It was notice that the lexical choices related to vague referents or ambiguous, as well as the use of the cristalized semantic constructions, prejudice the textual understanding, and this conduce to the low score. At the end of the analyzes, some exercises are proposed.
关键词：Ensino da escrita;Adequação lexical;Gênero redação;Competência comunicativa
其他关键词：Teaching of writing;Lexical adequacy;Genre essay;Communicative competence
