The study reaffirms that when a second language learner produces the language he/she is learning, there must be some errors. In addition, the errors, more or less, are caused by the interference of the first language. For Thai learners, the most frequent errors are caused by the omission of suffix in third person singular, in plurality and in past tense verb.
Suggestions for Future Study
Sample Size
It is recommended that a larger sample size be used in order to increase the degree of credibility.
Scope of the Study
Next study should be done more systematically and the error analysis should be extrapolated to the extent of overgeneralization, which is not less important than the error from mother tongue interference.
The Correction
To utilize the most of the study, the researcher should provide the correction as much as possible. This can benefit the learners more.