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The study involved 15 students in Academic Year 2021/2022 at SMA Negeri 1 Selakau. Data were collected using observation checklists and vocabulary tests, addressing difficulties understanding verb translation and multiple-choice questions in the textbook. 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It was conducted in two cycles by the researcher. The subject in this research was the students of 12th grade social 3 of SMA Negeri 1 Selakau in Academic Year 2021/2022 which consists of 15 students. The researcher found that the problem of this research was the students could not understand the vocabulary of the verb, then they had difficulty in understanding the English textbook and it was a big problem for the twelfth' grade students face the English examination. The data in this research were collected by using an observation checklist and test. The research showed the use of the Duolingo Application successfully could improve students’ vocabulary of present and past verbs. As observed by the researcher, the improvement was indicated by aspects of students' active and passive in answering the vocabulary questions from the teacher. The results found through the process of using the Duolingo Application, students were likely to raise their hands to answer the translation of twenty list questions of vocabulary from the teacher. Then, the students have a better understanding of the vocabulary’s meaning by a small number of students did not raise their hands, raise their hands, and answered correctly in a quick time. Therefore, this research was successful in improving the students’vocabulary of the verb by using Duolingo Application. |\n| Keywords: Vocabulary, Verb, Application, Duolingo |\n| Corresponding author Name: as Riva Febriani\u003Cbr>Email: [rivafebriani36@gmail.com](rivafebriani36@gmail.com)\u003Cbr>[Contact phone /WA: 083151183283](Contact phone /WA: 083151183283) |\n\nINTRODUCTION  \nVocabulary is a basic component of learning a language and takes an important role in learning a language. In learning a language, vocabulary supports the students to understand the meaning of their English textbook. Particularly the vocabulary of the verb that always appears in the student’s English textbook. The vocabulary of the verb is an important role in forming a sentence. Nothing sentences without a verb because a verb is always used in a sentence to describe a subject. Therefore, without a verb, a sentence is meaningless. This is the reason why learning the vocabulary of the verb is important. Since  \nverbs are considered important, students have to understand and study the verb to avoid misunderstanding the meaning of the text.  \nKnowing the importance of vocabulary in learning a language, the researcher was interested to know the competence of students’ vocabulary, especially in the verb of students at twelfth grade social 3 of SMAN 1 Selakau. Based on the observation and interview result on 3rd August 2021 with a teacher and the students in that class, all students at twelfth grade social 3 of SMAN 1 Selakau had some problems. The researcher knew that all of the students in that class have that problems from interviewing all of the students. Then the researcher got the result, that vocabulary was the most problematic for students, especially the vocabulary of the verb. The students had difficulty understanding the translation of the changing verb present into a past verb when they read and could not have the capability to answer the multiple-choice questions from the textbook. It was because when the students would find the translation of the present verb in their dictionary they could find the direct translation, while if the students would find a past verb they could not find the direct translation. Then, the students at Twelfth grade social 3 of SMAN 1 Selakau lack an understanding of the English textbook they used in class. The students did not have a solution for l","cbCaimCPaSVd5y7J","https://ap.wps.com/l/cbCaimCPaSVd5y7J","pdf",395485,11,"English","# Introduction\n## Background of the problem\n## Curriculum 2013 requirements\n## Proposed solution using Duolingo application","[{\"question\":\"What is the main objective of this research?\",\"answer\":\"To implement the Duolingo application and improve students’ English vocabulary, especially present and past verbs.\"},{\"question\":\"Who participated in the study?\",\"answer\":\"The participants were 15 students of 12th grade social 3 at SMA Negeri 1 Selakau in Academic Year 2021/2022.\"},{\"question\":\"How were the data collected and what evidence showed improvement?\",\"answer\":\"Data were collected with observation checklists and tests. Improvement was indicated by students’ active and passive responses, including faster and more correct answers to vocabulary questions.\"}]","Improving Student’s English Vocabulary Using Duolingo Application - Classroom Action Research | PDF",1790602791,28]