Crucial to being able to recognize the error in this sample is the knowledge of the subject-
predicate relation, which is a key property of a sentence. Such knowledge allows the
examine to notice that the error is the existence of the word that, which is incorrectly
placed between the subject and the main predicate of the sentence, thus preventing the
establishment of the relation between the two. Since an examine must know about this
in order to recognize the error, it is imperative to address the subject-predicate relation in
some noticeable way in classroom grammar instruction. (See Section 3 for pedagogical
suggestions.) But in the examination of the high school textbooks, it was noted that the
texts only briefly touched upon the relation between the subject and the predicate at the
very beginning of introducing the notions