omission of for viruses in the sentence. Hence, the answer is incorrect because the sentence of causative should have our computer after have causative.
e. The Combinations of Some Errors
The researcher also found some combination of errors in several answers in Part B. The combinations of errors in Table 4.6 are the combination of misformation
and misordering, misformation and omission, omission and misordering, omission and misformation, addition and misformation, addition and omission, and addition
and misordering. One example is student’s answer in question 8. Question 8
: Where did you get someone to repair your car? We’re looking for a good mechanic.
SA : Where did your car is repaired?
In this example, there are two errors in the student’s answer. First is the
omission of the phrase ‘We’re looking for a good mechanic’. This omission may be caused by the instruction that the students are asked to change the active causative
sentence only. Therefore, heshe only changed the active causative sentence into passive structure. The other missing things in the answer are you and get. You is
omitted because the student transfered the sentence into Indonesian as “Dimana
mobilmu diperbaiki?”. In the other hand, it seemed that the student acknowledged that the verb for the passive sentence should only be one verb, so heshe omitted get
and decided repaired as the verb for the passive sentence. Second, the sentence pattern shows two kinds of be: did and is. Did refers to
the subject your car while is refers to the past participle repaired. The use of is in the answer is an addition error. Furthermore, it may relate to the form of passive sentence
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
