SUMMARY
In teaching and learning English as a foreign language. The students should have the ability in using it in speaking or writing. However to be able to speak or write well, the students should have the mastery of structure. Because if they have lack of structure they will make errors. It is therefore, the writer would like to analyze the students? errors in using English negation. The subject is the students at the second semester of the seventh class of SMP PGRI 3 Bandar that consists of 40 students.In the data collecting technique the writer used essay test writing test, it means that ask the students to answer based on the teacher? questions in written dialogue and in analyzing the data the students was used surface strategy taxonomy.Based on the data analyzing of students? English negation of their writing dialogue, the writer described that there are 25 students who made errors from 40 students= 62.5%. And from 40 students the writer found 440 sentences. From 440 students, there are 199 in correct sentences= 27.04%..From 199 incorrect sentence or errors, there are 16 sentences in omission errors= 13.45%; addition errors is 16 sentences= 13.45%; misformation errors is 81 sentences = 68.06%; and misordering errors is 6 sentences= 5.04%. Based on kind of errors, it can be seen that misformation is the highest errors and misordering errors is lowest error.Most of the students? errors because of the students? ability of structure. It means that the students have lack of structure mastery especially in using auxiliary verb and the using of „not? and also the using tenses.