What words do people often confuse in place of primary structure ?
* Possessives , including those corresponding to pronouns – " my " , " your " , " his " , " her " , " its " , " our " , " their " , " whose " – and the Saxon genitives formed from other nouns , pronouns and noun phrases ( " one 's " , " everybody 's " , " Mary 's " , " a boy 's " , " the man we saw yesterday 's " ) .