UNIT1 Verb Tenses in Written and Spoken Communication UNIT2 Verbs:Aspect and Time Frames UNIT3 Subject-Verb Agreement Exercises for the TOEFL Test,Units1-3 UNIT4 Passive Verbs UNIT5 Article Usage UNIT6 Reference Words and Phrases Exercises for the TOEFL Test,Units4-6 UNIT7 Relative Clauses Modifying Subjects UNIT8 Relative Clauses Modifying Objects UNIT9 Nomrestrictive Relative Clauses Exercises for the TOEFL Test,Units7-9 UNIT10 Relative Adverb Clauses UNIT11 Correlative Conjunctions UNIT12 Sentence Connectors Exercises for the TOEFL Test,Units10-12 UNIT13 Modal Perfect Verbs UNIT14 Discourse Organizers UNIT15 Conditionals:Only If,Unless,Even Though,Even If Exercises for the TOEFL Test,Units13-15 UNIT16 Reducing Adverb Clauses UNIT17 Preposition Clusters UNIT18 Gerunds and Infinitives Exercises for the TOEFL Test,Units16-18 UNIT19 Perfective Infinitives UNIT20 Adjective Complements in Subject and Predicate Position UNIT21 Noun Complenents Taking That Clauses Exercises for the TOEFL Test,Units19-21 UNIT22 Subjunctive Verbs in That Clauses UNIT23 Emphatic Structures:Emphatic Do,No Versus Not UNIT24 Fronting Structures for Emphasis and Focus UNIT25 Focusing and Emphasizing Structures:It-Clefts and Wh-Clefts Exercises for the TOEFL Test,Units22-25
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