The plural form for the noun glass is glasses. The plural possessive form is glasses'.
Example: Her glasses' frame broke when she dropped them.
The plural possessive form is glasses'.
The singular possessive form is heart's; the plural possessive form is hearts'.
The noun 'sister' is not plural and is not possessive.The plural form is sisters.The possessive form is sister's.The plural possessive form is sisters'.
The plural form is squirrels. The plural possessive is squirrels'.
The plural form is cockroaches; the plural possessive form is cockroaches'.
The possessive form for the singular noun glass is glass's (just as you have it in your question).The plural form is glasses. The plural possessive form is glasses'.Example: I like these glasses' pattern the best.
The plural possessive form is glasses'.
The noun glass has a number of uses, all of them are uncountable nouns, except for a drinking glass. The plural possessive is glasses'; the set of glasses' color.The singular possessive for a pair of glassesused for eyesight is glasses', the glasses' frame. The plural possessive is the glasses' frames. The plural possessive is the same because it is a shortened form for the pairs of glasses' frames.The singular possessive for a pane of glass, used for windows is the glass's size. The plural possessive is the glass's sizes. The plural possessive is the same because it is a shortened form for the panes of glass's size.
The singular possessive form is heart's; the plural possessive form is hearts'.
The plural form is founders. The plural possessive is founders'.
The plural form for the noun sergeant is sergeants; the plural possessive form is sergeants'.
The singular possessive form for the noun knife is knife's.The plural form is knives; the plural possessive form is knives'.
The noun 'sister' is not plural and is not possessive.The plural form is sisters.The possessive form is sister's.The plural possessive form is sisters'.
The singular possessive form of the noun mirror is mirror's.The plural form of the noun mirror is mirrors.Thee plural possessive form is mirrors'.Examples:The mirror's frame cracked and the glass fell to the floor. (singular)All of the mirrors' reflections gave varying perspectives of the room. (plural)
The singular form is goose; the singular possessive form is goose's.The plural form is geese; the plural possessive form is geese's.
The plural possessive form of "cherubim" is "cherubim's."
The plural possessive form of "reply" is "replies'".