Ключевые слова: adjective, adverb, background, blackboard, board, business, chalk, chalkboard, classroom, communication, concept, conjunction, discussion, education, english, foreign, grammar, interjection, knowledge, language, learn, learning, lesson, man, many, memory, modern, new, noun, parts, preposition, pronoun, school, speak, speech, student, study, talking, teacher, tense, test, text, thinking, university, various, verb, white, word, write,