A concurrent sentence is a sentence in which a facultative phrase acts as a predicate or an independent sentence. The concurrent sentence has the following characteristics: first, the predicate of the concurrent sentence is composed of verb-object phrases and subject-predicate phrases, and the object of verb-object phrases is also the subject of subject-predicate phrases. Second, most of the concurrent sentences have the meaning of causative
the former predicate in the sentence is mostly served by the causative verb. Third, the predicate in the sentence is the purpose or result of the previous action, that is, there is a certain semantic connection between the two verbs before and after the sentence. I asked him to give a report is a concurrent sentence.
The school calls on graduates to teach.