by mschwrtz Tue Jun 29, 2010 3:08 am
The structural clues are just the same as they would be for nouns: subjects take action or attributes; objects are part of the predicate; possessives are effectively adjectives.
Pronoun case is a bit easier to determine, though, because it's more often signaled by the way the word is spelled and pronounced. Consider
SUBJECT OBJECT POSSESSIVE
it it it
they them their
he him his
she her her/hers
Case doesn't actually account for much on the GMAT.