Why did we not learn Habetula like Haisha in Kedushin? Was it because there it was referring to a specific case the Yevamot?
Gershon, Cote Saint Luc Canada
Tosfos explains that the Mishna uses the prefix Ha (the) when the word used is in a Pasuk, such as Ishah and Yevamah. In such cases, when the Mishnah explains that Pasuk, it says "The...".
The word Besulah is not mentioned in the Torah concerning marriage. That is why the Mishnah does not call her "The Besulah."
All the best,