This page provides a record of edits and changes made to this book since its initial publication in the Books4Languages Open Textbook Collection. Whenever edits or updates are made in the text, we provide a record and description of those changes here.
- If the change is minor, (m).
- If the edits involve substantial updates, (M).
The files posted by this book always reflect the most recent version.
| Version | Date | Change | Affected Web Page |
| 1.0 [1] | 2019 | Primary release (M) | Introduction, Form, Example, Use and Summary sections |
| 2.0 [2] | 2020 | Complementary sections and Summary rephrase (M) | Summary, Relate and Exercises sections Videos and other URLs |
| 3.0 | 2021 | Upgrade, speeling and rephrase as appropriate (m) | Introduction, Form, Examples and Use sections |