A word form refers to one form that a word can take, e.g. the word go can take these word forms go, went, gone, goes, going. Searching for the word form going will not find any other forms of the word. It is case sensitive. apple and Apple are two different word forms.
https://www.sketchengine.eu/wp-content/uploads/SE_logo_330x150-bleed-transp-bg.png 0 0 2016-05-25 23:03:232016-12-13 13:29:33word form