In English vocabulary teaching, the memory of root and affix is very important, root affix is the basis of English vocabulary, mastering the knowledge of root affix can improve the learning efficiency of English vocabulary. However, the root affix and normal English words are different, it often does not have a specific meaning, and is usually composed of one or two letters, which brings difficulties to students' understanding and mastery, and the use of mind map can effectively reduce the difficulty of students to understand and master root affix, to help students master root affix has a positive role.
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