Grammatical errors produced by students of the English department at Petra Christian University in their writing

This study is about grammatical errors that are produced by "writing 2" students of English Department at Petra Christian University in their mid term exam. The writer realizes that understanding the rules of grammar is very important in order to write well. She is interested in grammatical errors topic because many students still get confused to use the right grammar. In her study, she wants to know what type of errors that the students usually produce and what type of error which is mostly produced by students. The writer limits her research on grammatical errors only, so she does not investigate other errors, such as phonological errors, spelling errors, vocabulary, punctuation and organization. She takes mid term paper of 'writing 2' for her data. In analyzing the data, she uses Jack C. Richards?s classification of grammatical errors theory. After doing the analysis, she finds that the types of grammatical errors that are usually produced by ?writing 2? students are Errors in the Production of Verb Groups, especially the use of tense form, Miscellaneous Errors, especially the use of singular form and Errors in the use of Prepositions, especially the use of ?of?. Errors in the Production of Verb Groups is the type of grammatical errors that is mostly produced by the ?writing 2? students of English Department