Introduction 前言Unit1 Prepositions 介词 1
Unit2 Pronouns and Determiners代词和限定词 13
Unit3 Nouns名词 25
Unit4 Conjunctions and Connectives连接词 35
Unit5 Adverbs and Adverbials副词和状语 46
Unit6 Participles分词 58
Unit7 Gerunds动名词 69
Unit8 Infinitives不定式 77
Unit9 Verbs（Linking Verbs and Auxiliary Verbs）动词（联系动词和助动词） 85
Unit10 Tenses and Agreement时态与一致 92
Unit11 Conditional Sentences条件句 103
Unit12 Phrasal Verbs短语动词 112
Unit13 Object Complements宾语补语 123
Unit14 Clauses从句 128
Unit15 Comparisons比较句 139
Unit16 Inversions倒装句 145
Unit17 Word Order词序 153
Unit18 Parallel Structures平等结构 167
Unit19 Redundancy词赘 175
Unit20 Right Words正确词 180
Test1试题1 187
Test2试题2 194
Test3试题3 200
Test4试题4 206
Test5试题5 212
Answer Keys参考答案 218