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Unit 1: Understanding English Sentence Structure
http://www.ryerson.ca/studentservices/learningsuccess/pdf/unit1.pdf
将数字依次改成2-15, 就可以得到以下单元的PDF内容
Unit 2: Working with Simple Sentences
Unit 3: Working with Compound Sentences
Unit 4: Working with Complex Sentences
Unit 5: Working with Relative Clauses
Unit 6: Changing Clauses to Phrases
Unit 7: Working with Compound/Complex Sentences
Unit 8: Some Rules for Using Commas and Semicolons
Unit 9: Revising Common Errors in Sentence Structure
Unit 10: Forms of Present Tenses, Active Voice
Unit 11: Forms of Past Tenses, Active Voice
Unit 12: Forms of Future Tenses, Active Voice
Unit 13: Avoiding Common Errors with Verbs
Unit 14: Using Pronouns Correctly
Unit 15: Using Apostrophes with Possessive Nouns