This paper examines the difference of degree of acceptability for suffix passive constructions and -eojida passive constructions, and the double-passive constructions in which both are combined. Afterwards, claim that the doublepassive constructions should be regarded as a well-formed passive constructions like the other two passive constructions. For this, we compare the acceptability of the acceptability of the double-passive constructions, suffix passive constructions and the -eojida passive constructions using descriptive statistics and one-way repeated measures ANOVA. As a result, the acceptability of the suffix sentence is highest, followed by the double-passive constructions and the -eojida passive constructions. Although double-passive constructions is treated as a non-grammatical sentence in school grammar, some items have the highest acceptability of double-passive constructions, as can be seen from the descriptive statistics. In addition, it is higher than the acceptability of the -eojida passive constructions in all questions. Taking these results into consideration, a double-passive constructions can be regarded as a qualified passive sentence, just like the other two passive constructions. In consequently, double-passive constructions can be interpreted as a combination of passive and other meanings (potential, unintentional, etc.).