Try a Sample
The following paragraph has errors of several sorts. Copy and paste it into a word processor and then edit it as carefully as you can. First look for sentence punctuation errors (fragments, comma splices). You might also consider combining some sentences to reduce repetition and wordiness. Then check subject-verb agreement and pronoun reference. Finally, check all commas and proofread one last time for spelling.
Most people visualize sorority girls as snobby and very "house" oriented, my friend Lisa is much more friendly and barely involves herself in house activities or conforms to their regulations. Snobbery is an aspect of the sorority girl image, they accomplish this task by interacting with a selective crowd which consist of girls from the house, fraternity boys, and possibly family. The frat boys serve as potential dates; seeing as frats and sororities exclusively party together. A sorority girl would never think of picking up a man off the street. On the other hand, theres Lisa who is no snob, as a matter of fact shes in no way judgmental of who she talks to, if they are friendly to her she will be the same. Its obvious that shes friendly to just about everyone because thats how she met her boyfriend by just saying "hi" one day. Another aspect of the sorority girl stereotype is strict conformity to house rules which prohibit drinking and men in the room, making the girls seem so disciplined and innocent. But then there is Lisa who loves to party, and theres nothing she likes more than to stay out late at a good party completely blowing off curfews. Also, if she wants to bring a guy home she won't hesitate to sneak him in the back way and up to her room. Another way the sorority girls seem so house oriented is shown in the constant dances, parties, and dinners they attend. All the girls goes as a house and are expected to act like she's having a good time even when its a terrible party and they're bored. Lisa refuses to go to these boring parties. And pretend she's having fun. She'd rather forget the party the house goes to and go out with other friends, even if she knows she'll be in trouble. Threfore, as you can see by my description of Lisa's personality she doesn't fit the normal stereotype of a sorority girl.