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Vocabulary is an important part of human language，which plays a key role in the process of language learning.In recent years，more and more attention has been paid to vocabulary teaching.The existence of lexical chunks accelerates the speed of language processing，which is of great significance to language acquisition and fluency.Lexical chunk teaching method emphasizes the cultivation of learners' lexical chunk ability，that is，the ability to master the fixed phrases，collocations and sentence patterns that often appear in communication，so as to combine vocabulary acquisition，grammar acquisition and communication ability cultivation.Under the guidance of prefabricated chunk theory，this paper studies the role of prefabricated chunk theory in junior high school English teaching practice.The use of lexical chunks in junior high school English teaching has certain effect，which can help students to use English skillfully and accurately.Junior middle school English teachers should use various means to implement lexical chunk teaching in English teaching，so that students can get inspiration from lexical chunk teaching，recognize lexical chunks and memorize lexical chunks consciously in learning，so as to broaden their vocabulary more quickly and better，so as to improve their English comprehensive level.In practice，due to my limited energy and research time is not long，there are some defects and deficiencies in this study，and this study needs to be further improved and developed.I believe that chunk teaching will have a great positive impact on junior high school English Teaching in the future.
Key words：chunk，chunk teaching，junior high school English Teaching
As we all know，vocabulary is the basic element of a sentence and the foundation of all language skills.Therefore，vocabulary teaching is the key and difficult problem in English teaching.The theory of lexical chunks，which originated from the study of contemporary lexicology，can effectively realize the unity of "quantity" and "quality" in English vocabulary teaching from two aspects of vocabulary structure and context.Lexical Chunk Theory emphasizes that chunk is a complex of grammatical，semantic and contextual functions.It is better than traditional isolated vocabulary learning to use lexical chunks in vocabulary teaching and put them in specific context.It reflects the text factors of the English system，creates a supporting environment for the construction of vocabulary memory and use，and helps to reduce the negative impact of mother tongue on students' vocabulary learning，thus reducing the burden of students' vocabulary memory and cultivating students' habits of English thinking. It is hoped that through this research，teachers should fully understand and pay attention to the importance of chunk teaching in English teaching，and strive to cultivate students' awareness of using chunk in English learning，so as to improve their English learning performance.Guide students to find lexical chunks in English learning，memorize these lexical chunks as a whole，and use them in real communication，so as to gain the ability to use the language in use，so as to truly master the language.
Students are encouraged to use lexical chunks for speaking and writing.Students should be encouraged to speak and write more.Before speaking training，the teacher first introduces the use of lexical chunks，explains the scene of lexical chunks，the identity of the speaker，etc.，so that students can master these lexical chunks through repeated training.In the training of writing，we can use multiple methods，such as multiple choice questions，cloze，dialogue，translation and so on，to examine the students' ability to use chunks.
As a tool of language learning，grammar helps us to learn and understand language better.Therefore，in English teaching，we should give consideration to both of them.
References：
[1]IngwerBorg，HenrikDobewall，ToivoAavik.Personal values and their structure under universal and lexical approaches[J].Personality and Individual Differences，2016，96.
[2]J.M.Cotelo，F.L.Cruz，J.A.Troyano，F.J.Ortega.A modular approach for lexical normalization applied to Spanish tweets[J].Expert Systems With Applications，2015，42（10）.
[3]（Luna）Jing Cai.An exploratory study on an integrated genre-based approach for the instruction of academic lexical phrases[J].Journal of English for Academic Purposes，2016，24.
Key words：chunk，chunk teaching，junior high school English Teaching
As we all know，vocabulary is the basic element of a sentence and the foundation of all language skills.Therefore，vocabulary teaching is the key and difficult problem in English teaching.The theory of lexical chunks，which originated from the study of contemporary lexicology，can effectively realize the unity of "quantity" and "quality" in English vocabulary teaching from two aspects of vocabulary structure and context.Lexical Chunk Theory emphasizes that chunk is a complex of grammatical，semantic and contextual functions.It is better than traditional isolated vocabulary learning to use lexical chunks in vocabulary teaching and put them in specific context.It reflects the text factors of the English system，creates a supporting environment for the construction of vocabulary memory and use，and helps to reduce the negative impact of mother tongue on students' vocabulary learning，thus reducing the burden of students' vocabulary memory and cultivating students' habits of English thinking. It is hoped that through this research，teachers should fully understand and pay attention to the importance of chunk teaching in English teaching，and strive to cultivate students' awareness of using chunk in English learning，so as to improve their English learning performance.Guide students to find lexical chunks in English learning，memorize these lexical chunks as a whole，and use them in real communication，so as to gain the ability to use the language in use，so as to truly master the language.
Students are encouraged to use lexical chunks for speaking and writing.Students should be encouraged to speak and write more.Before speaking training，the teacher first introduces the use of lexical chunks，explains the scene of lexical chunks，the identity of the speaker，etc.，so that students can master these lexical chunks through repeated training.In the training of writing，we can use multiple methods，such as multiple choice questions，cloze，dialogue，translation and so on，to examine the students' ability to use chunks.
As a tool of language learning，grammar helps us to learn and understand language better.Therefore，in English teaching，we should give consideration to both of them.
References：
[1]IngwerBorg，HenrikDobewall，ToivoAavik.Personal values and their structure under universal and lexical approaches[J].Personality and Individual Differences，2016，96.
[2]J.M.Cotelo，F.L.Cruz，J.A.Troyano，F.J.Ortega.A modular approach for lexical normalization applied to Spanish tweets[J].Expert Systems With Applications，2015，42（10）.
[3]（Luna）Jing Cai.An exploratory study on an integrated genre-based approach for the instruction of academic lexical phrases[J].Journal of English for Academic Purposes，2016，24.