目录 Unit 1 The Parts of a Sentence Unit 2 The Structure of a Sentence Unit 3 The Types of a Sentence Unit 4 Word Order Unit 5 Agreement of Subject and Verb Unit 6 Verbs Ⅰ Forms Unit 7 Verbs Ⅱ Tenses Unit 8 Verbs Ⅲ Mood and Voice Unit 9 Verbs Ⅳ Number Unit 10 Auxiliary Verbs Unit 11 Modal Verbs Ⅰ Unit 12 Modal Verbs Ⅱ Unit 13 Pronouns Unit 14 Adjectives and Adverbs Unit 15 Infinitives,Participles and Gerunds Unit 16 Determiners Unit 17 Noun Clauses Unit 18 Relative Clauses Unit 19 Adverbial Clauses Unit 20 Conditional Clauses Answers to Exercises
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