Key points are not available for this paper at this time.
Part One: A guide to the use of this book (Sections 1-56) Part Two: Grammar in use (Sections 57-434) Section A: Concepts Section B: Information, reality and belief Section C: Mood, emotion, attitude Section D: Meanings in connected discourse Part Three: A-Z in English grammar (Sections 435-747)
Vann et al. (Sun,) studied this question.