The most important rule of grammar regarding proper trademark use is that a trademark should be used as an adjective, not a noun or verb. When the mark is used as an adjective it distinguishes the mark from the generic term it modifies. It is important to follow this rule to prevent the mark from potentially becoming considered generic, and loosing all its protection. Other rules of grammar important to proper trademark use include avoiding the use of a trademark in the plural or possessive form. When referring to more than one trademarked product, the trademark should not be pluralized.