I am having trouble understanding pronouns, predicate nominatives, direct objects, indirect objests, and object of prepostion. I don't know how to tell them apart. What's an easy way to undertstand them?

Answer 1

First, I suggest you memorize the most common pronouns and prepositions.

http://www.google.com/imgres?imgurl=http://www.widgit.com/widgitrebus/images/pronouns3.gif&imgrefurl=http://www.widgit.com/widgitrebus/rebus_html/pronouns.htm&h=407&w=735&sz=12&tbnid=7_wc_fqkP5A3NM:&tbnh=78&tbnw=141&prev=/images%3Fq%3Dpronouns&hl=en&usg=__uvlT1hiuGH9J_tAqPdRMlwNi5n4=&ei=VywoS_nNIZTllAfE3amqDQ&sa=X&oi=image_result&resnum=8&ct=image&ved=0CBoQ9QEwBw

http://www.englishclub.com/grammar/prepositions-list.htm

Then study this site carefully.

http://grammar.ccc.commnet.edu/grammar/objects.htm

The object of a preposition always follows a preposition.

In short, there's no "easy way" to understand these complex sentence parts without a lot of study and practice.