Here are eight common ESL problems to watch out for.
from http://college.cengage.com/devenglish/fawcett/evergreen/7e/students/esl_errors.html
Error #1: Count or Noncount Noun Error
Error #2: Incorrect or Missing Article
Error #3: Preposition Error
Error #4: Repeated Subject
Error #5: Wrong Verb Tense
Error #6: Irregular Verb Errors
Error #7: Wrong Form After a Verb
Error #8: Wrong Order of Adjectives
