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Using a descriptive qualitative design, it involved 64 eighth-grade students from SMP Negeri 3 Mlati who completed guided writing tasks in pairs, producing 157 sentences. Each sentence was assessed for correctness and errors were categorized as grammatical, lexical, and structural. Results show 82.2% correct sentences, while errors mainly appeared in sentence structure, then grammar and vocabulary, including missing prepositions, incorrect verb forms, and wrong word order. Findings indicate that collaborative writing with targeted feedback can improve accuracy and support teacher-focused practice.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/an-analysis-of-grammatical-and-lexical-errors-in-junior-high-school-students-writing-of-simple-english-copular-sentences/414111/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/an-analysis-of-grammatical-and-lexical-errors-in-junior-high-school-students-writing-of-simple-english-copular-sentences/414111.png","ImageObject",300,407,{"name":92,"@type":93},"Valentina","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-28",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What type of English sentences does the study analyze?","Question",{"text":112,"@type":113},"The study analyzes simple English copular sentences formed with a subject plus was or were plus an adjective.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How was the research conducted and what data were collected?",{"text":117,"@type":113},"A descriptive qualitative design was used. Sixty-four eighth-grade students completed guided writing tasks in pairs, producing 157 sentences, which were then checked for correctness and errors.",{"name":119,"@type":110,"acceptedAnswer":120},"What kinds of errors were most frequent?",{"text":121,"@type":113},"Errors were most common in sentence structure, followed by grammatical and lexical issues. 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A descriptive qualitative design was employed with 64 eighth-grade students from SMP Negeri 3 Mlati as participants. The students worked in pairs to complete guided writing tasks, producing a total of 157 sentences. Each sentence was analyzed to determine whether it was correct or contained errors, and any errors were classified grammatical, lexical, and structural categories. The findings reveal that 82.2 percent of sentences were correct, showing that most students have a solid understanding of basic sentence construction. Nevertheless, errors were observed, especially in sentence structure, followed by grammar and vocabulary, highlighting areas requiring additional support. Frequent mistakes included missing prepositions, incorrect verb forms, and improper word order, reflecting difficulties in applying rules consistently. The study shows that collaborative writing exercises with targeted feedback can enhance students’ writing accuracy. It provides insights for teachers to design focused practice and contributes to understanding how structured tasks improve junior high school students’ English writing skills.  \nKeywords: grammar errors; simple sentences; writing skills; english learning; junior highschool students  \nWriting is one of the essential skills in learning English because it allows students to communicate ideas, feelings, and information in an organized and meaningful form. Byrne (1988) states that writing is the ability to put thoughts into written symbols that can be understood by others. At the junior high school level, writing instruction usually begins with simple exercises that help students learn how to form basic English sentences. These early practices are important because they build the foundation for developing more advanced writing abilities such as composing descriptive and narrative texts (Rojas, 1968) .  \nLECTIO: Journal of Language and Language Teaching. 5 (2), 2025  16  \nIn classroom activities, one of the basic exercises given to students is writing simple sentences that describe a subject by using adjectives. This activity helps students recognize the use of the verb, to be, and different kinds of adjectives in a clear context. However, in practice, many students still find it difficult to construct grammatically correct sentences even after receiving explanations and examples from the teacher (eg., Alsalami, 2022; Rosadi, 2022) . These difficulties can generally be grouped into three main aspects, namely grammar, vocabulary, and sentence structure.  \nGrammar is a crucial element in forming correct sentences. Azar (1999) defines grammar as a system of rules that governs how words are combined to create meaningful expressions. In writing, students often struggle to apply grammatical rules correctly, especially when deciding which form of the verb to use with a particular subject. This situation shows that grammatical u","cbCainN4P36jXVnJ","https://ap.wps.com/l/cbCainN4P36jXVnJ","pdf",774985,11,"English","# ABSTRACT\n## Research focus\n## Method and participants\n## Error categorization\n## Key findings and implications","[{\"question\":\"What type of English sentences does the study analyze?\",\"answer\":\"The study analyzes simple English copular sentences formed with a subject plus was or were plus an adjective.\"},{\"question\":\"How was the research conducted and what data were collected?\",\"answer\":\"A descriptive qualitative design was used. Sixty-four eighth-grade students completed guided writing tasks in pairs, producing 157 sentences, which were then checked for correctness and errors.\"},{\"question\":\"What kinds of errors were most frequent?\",\"answer\":\"Errors were most common in sentence structure, followed by grammatical and lexical issues. Common mistakes included missing prepositions, incorrect verb forms, and improper word order.\"}]","AN ANALYSIS OF GRAMMATICAL AND LEXICAL ERRORS IN JUNIOR HIGH SCHOOL STUDENTS’ WRITING OF SIMPLE ENGLISH - COPULAR SENTENCES | PDF",1790596682,28]