The final week is about "polishing" your skills. Focus on common errors, such as subject-verb agreement and the tricky use of articles (a, an, the). Use the final two days for immersion. Read English articles, listen to podcasts, and try to identify the grammatical structures you have learned in the wild.
If you specifically want the book Master English Grammar in 28 Days (check the exact author first): Master English Grammar In 28 Days Pdf Free Download
Avoid sites asking for credit card information or "free trials." Legitimate grammar PDFs should be completely free. If a site feels suspicious, do not download. The final week is about "polishing" your skills
