English Grammar Drills

English Grammar Drills

For example, they could distinguish the possessive form of the noun friend from the plural form: Possessive: Plural: friend's friends The use of the possessive apostrophe after the -s to indicate that a noun is both plural and possessive did not become standard until the beginning of the nineteenth century.

McGraw Hill

http://holismoplanetario.com/2010/08/07/40-sitios-para-descargar-libros-en-forma-gratuita/

2009-09-10