From the tables above, it can be seen that the basic sentences pattern 7 usage is the biggest problem which equals 30 percent of all errors. Pattern 1 are secondary problem considered 26.67 percent. The third biggest problem is pattern 3 which is 21.67 percent. And it can be seen that capitalization usage is the biggest problem which equals 22.89 percent of all errors. Redundancy and full stop are secondary problem considered 15.85 percent. The third biggest problem is singular/plural form which is 12.32 percent.