Therefore, when speaking
English, Indian people tend to change the target language consonant sounds that do
not have the phonetic features of their mother tongue to the sounds that they are
familar with (Fromkin, Rodman, & Hyams 2007). Another reason may be that Thai
people are not native English speakers so they would normally be unfamiliar with
English. Another possible reason is that, they do not have a good knowledge of
English vocabulary. It is said that listening skills are more difficult than any other
skills. It needs a basic knowledge of grammar, vocabulary coherence, cohesion,
idioms, expressions and so forth (Mohiden H. cited Corder, 1974). However,
according to the results, they did not confront the problem so much in reading skills.
Nevertheless, in each skill, there are also remarkable points that are worth discussing,
which are described below: