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English Made in Brazil: Writing English Correctly
A very useful page from English Made in Brazil designed to help Portuguese English language learners write better in English. Subject placement, objectivity, brevity, and words of transition are some of the points discussed. Great examples.
Capital Community College Foundation
Guide to Grammar and Writing: Cases of Nouns and Pronouns
In this writing and grammar tutorial, learn how to distinguish and use nouns and pronouns in English and whether they are subjective, nominative, possessive, or objective.
Towson University
Towson University: Ows: Pronoun Case Exercise 2
This is a 10-question, self-grading exercise/quiz on Pronoun Case.