英语翻译The frequent change of English teaching textbooks is to

The frequency of changing English teaching textbooks is to enlarge learners' vocabulary andimprove their grammatical competece.Textbook has a vital and positive part to play in the everyday job of teaching and learning English,and that the importance of the textbook becomes even greater in periods of change.Finally,we consider the implications of a more informed and positive view of the role of the textbook,emphasizing,in particular,the need to see textbook creation and teacher education as complementary and mutually beneficial aspects of professional development.

英语教材的频繁变化是为了扩大学生的词汇和提高他们的语法能力 望采纳

english teaching textbooks have been changed many times. this is good for the leaners to enlarge their vocabulary and also good for them to better understand their grammar rules and have better grammer abilities.

The Method of enlarging learners' vocabulary and improving their grammatical competence is changing the teaching textbooks of English frequently.