The aims of this research were (1) to find out the types of grammatical errors made by the
student (2) to know the frequency of error that made by the students. The method used in this research
was descriptive research. This research chose the eleventh year students of SMK Muhammadiyah
Bobotsari in academic year 2014/2015 as population. The total population was 300 students. This
research took 15% from the population, so the sample of this research was 45 students. The errors
collected were identified and classified using Linguistic Category Taxonomy as a guideline. The results
present the types of grammatical error and the percentage of each type
.
The type of grammatical error was
divided into morphology and syntax category. From the highest to the lowest
frequency of occurrence in
morphology category, as follows
:
(1) error in plural noun (10.47%), (2) error in
past participle (5.24%),
(3) error of indefinite article (4.71%), (4) error
in
simple past tense (4.19%), (5) error in using adjective
and adverb (4
.19%) and (6) error
in
possessive case (1.05%). In syntax category (1) error in the use of
past tense (29.32%), (2) error
in
verb
-
and
-
verb construction (13.09%), (3) the addition of to be (13.09%),
(4) the omission of main verb (12.04%), (5) error in word
order: noun phrase (1.57%) and (6) the
omission of there is reached 1.05%