I. Grammar

Word formation:-ity/-ility

(1) As a suffix added to the adj.

(2) Forming nouns

(3) Describing the state

Examples:

1. When it comes to bad things happening in threes, what may be most important of all is the duration and memorability of the first thing.

II. Writing Features

How is the text structured?

(1) Clarity

(2) Logic: General-to-particular pattern