Omission Students’ Errors in Part B
in Indonesian. The passive form in Indonesian is marked by the presence of {
di-
} before the verb Moeliono, 1987: 280. Due to the transfer of language
diperbaiki
in Indonesian, the student finally decided to put
is
before
repaired
. Moreover, Table 4.6 shows that the mixing of addition and misformation has
the highest number compared to other combinations in total errors. This can be observed from student’s answer in question 9.
Question 9 : We need to have someone check out our computer for viruses.
SA : Someone is had to be needed to check out our computer.
Student’s answer above has four types of mistakes. First, the student changed the sentence into regular passive voice. It can be observed from be
is
in the sentence. The researcher tried to observe all the answers done by the student who wrote the
sentence above. The result was the student changed the entire question into regular passive voice. It shows that the student did not acknowledge the passive form of
causative. In the other hand, the student only changed the sentence into what heshe only knew about that was the form of regular passive voice.
Second, the student misunderstood
have
causative in the sentence and considered it as modal form of
have to
. It is probably because the word
to have
in the question that had tricked the student to think it as modal of
have to
. As the result, the student changed it into the passive form of
have to
as modal:
had to be needed
. Third, the student put double be in the sentence:
is
and
had
. This kind of error is called double marking which can be categorized as addition error Dulay, Burt, and
Krashen, 1982: 156. The student acknowledged that the question is in present tense so heshe wrote
is
as the be for the passive form. However, because heshe also mistakenly considered
to have
as modal tense, heshe put
had
as the second auxiliary. Fourth, the student added the to-infinitive clause in the sentence:
to check out our computer
. This can be resulted from the translation of the question in Indonesian as:
Kami perlu menyuruh seseorang untuk memeriksa komputer kami dari virus
. Because the student added
untuk
in the translation, heshe added to-infinitive clause in the answer. In addition, there is also omission of
we
and
for viruses
.
We
is deleted because the phrase
by us
is not necessary to be put in a passive form. Meanwhile,
for viruses
is deleted because student thought it just an adjunct, an additional information for the sentence.
From the analysis, it can be observed that the student had errors in misformation and addition. Misformation error can be seen from the change of active
causative into regular passive voice and the formation of
have
causative into
have-to
as modal. Addition error can be observed from double marking error and the presence of to-infinitive clause in the answer.