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 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 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)
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is lads. The plural possessive is lads'.
The plural is relatives. The plural possessive is relatives'.
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 plural form for the noun glass is glasses. The plural possessive form is glasses'.Example: Her glasses' frame broke when she dropped them.
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)
Singular possessive: secretary's Plural: secretaries Plural possessive: secretaries'
The plural is relatives. The plural possessive is relatives'.
The plural is lads. The plural possessive is lads'.
The plural form is echoes. The plural possessive is echoes'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural form is stepsisters. The plural possessive is stepsisters'.
The plural form is inches. The plural possessive is inches'.