Subject-Verb Concordance Problems
In English and other Romance languages, unlike Japanese, the verb form varies depending upon whether the subject is plural or singular. Most commonly, errors are made when authors mistake the object of a preposition for the subject. To be honest, even well-trained native English speakers sometimes make this mistake. The example below illustrates this situation. The prepositional phrase, “of these reproduction-specific, non-coding RNAs,” terminates with a plural noun (RNAs), but the subject of the sentence is “length.” The original sentence compounded the problem by adding the subject a second time in a final prepositional phrase (in length).