Corpus-based Extraction of Modals in Consecutive Sentences

This work presents a method of learning modal auxiliaries. In our method, two consecutive uses of modals are given as example sentences. These are beneficial for learners to recognize the flow of thought in context. We also present a method of extracting example sentences from a corpus. Here sentences in the corpus are parsed and analyzed to extract only the main clauses, which are essential parts to convey the flow of ideas. Extracted sentences are simplified and examples can be retrieved in many different situations, therefore, examples can be useful for both teachers and learners alike.