The current paper provides the syntactic analysis for the agreement attraction of the plural subject in English and Korean and subject honorification in Korean in terms of the syntactic subject-verb agreement. The ramifications of this paper include that there are features like [+PL] or [+HON] in the subject that undergo upward or downward percolation other than [WH]. Supporting evidence for the subject-verb agreement is attested along with feature percolation of [+PL] in English and Korean and [+HON] in Korean (Ross, 1967; Hudson, 2013; Hong, 2018). The agreement or its frequent error is affected by the hierarchical structure between an agreement target and a local attractor. The [+PL] feature in English and Korean and [+HON] feature in Korean are also suggested to be a local attractor for the subject-verb(al predicate) agreement. In the coordinate structure of the subject in Korean, the [+HON] feature of the last element is a strong one, so only its [+HON] feature undergoes upward percolation to the entire subject DP, which is consistent with si of the verbal predicate.