Click HERE for this document that grew from a question about how we know when to use the <-s> or the <-es> form of this suffix. So much is available to learn from this question -- and for those who own the annual or life-time version of the Tool Box 2, you can use this discussion as a launching pad to the deeper understanding avialable from that excellent theme!
The screen shot below offers an intro to the content. You need to click the link to get the details!
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