摘要：The ability of using English in the era of globalization is very needed. If we want to be able to use English, we have to master English grammar. And Simple Past Tense is one of the important tense in grammar and commonly used in English. Irregular verb in English Grammar is complicated and cause many difficulties for students. The aims of this research are to describe the common errors that students made in using simple past tense, and it is found from the percentage of error answers made by the students in using simple past tense. The writer using field research and giving test to the students as samples. To get more data and to complete the data the writer uses a field research also takes some data from the books and browses internet. From the result of the test, there are common errors made by the students include: 1. The structure for question sentences in the simple past tense, 2. Verbs which change their meaning depend on whether they are regular or irregular, 3. Verb of past tense (irregular).
