Thai interference in the use of English adjectives

The purpose of the study was to investigate how much and in what cases L1 interference occurred when Thai students produced English structures containing adjectives. Forty Mattayomsuksa three students at Patumratchawongsa School, Amnat Charoen, Thailand were randomly selected as the subjects of the study. The instrument was a translation task containing predicative and attributive adjectives of eight semantic types-quality, quantity, color, shape, size, age, temperature and nationality. The results of the study that 66.67% of predicative and attributive adjectives were influenced by L1, and L1 interference occured in the use of adjectives of 7 semantic types