sentences:  Traditionally words were only considered prepositions if they governed the case of the noun they preceded, for example causing the pronouns to use the objective rather than subjective form, "with her", "to me", "for us".But some contemporary grammars such as that of no longer consider government of case to be the defining feature of the class of prepositions, rather defining prepositions as words that can function as the heads of prepositional phrases.English verbs are inflected for tense and aspect and marked for agreement with present-tense third-person singular subject.