FORMSOF Term
The FORMSOF term performs matches by using other linguistic forms of the word. Following is the FORMSOF term syntax:
FORMSOF (<generation_type>,<match_words>)
The generation_type specifies how Microsoft Windows Search chooses the alternative word forms. The INFLECTIONAL value chooses alternative inflection forms for the match words. If the word is a verb, alternative tenses are used. If the word is a noun, the singular, plural, and possessive forms are used to detect matches.
The match_words part can be one or more words, separated by commas. The words cannot contain spaces or punctuation, so you do not need to enclose them in quotation marks.
Examples
The following example searches for inflectional matches for the word "run". This example matches documents containing "run", "running", or "ran".
...CONTAINS('FORMSOF(INFLECTIONAL,"run")')