The Formatting rule includes the methods of writing consecutive paragraph or sentences. Just as a paragraph is a collection of sentences unified by a topic sentence and developed by supporting sentences, so too, a chapter very often has a theme that is developed by a skillfully sequenced set of paragraphs. Rashi knew of 3 methods of writing consecutive paragraphs
• Cause-effect: The second paragraph is the effect of the first paragraph. The first paragraph is the cause of the second paragraph.
• Contrast: The two paragraphs illustrate contrasting sides of a theem.
• Unified theme: The two or more paragraphs illustrate a common theme. For example a common theme may be illustrated by a sequence of paragraphs each of which exemplifies and illustrates the theme idea.
The above three principles indicate methods for paragraph development into chapters as well as method for sentence development into paragraphs.

We formerly classified paragraph and chapter development under the grammar rule. However we think it more proper to devote the grammar rule to the relation between meaning and form, for example how verb conjugational forms indicates meaning. As indicated above the formatting rule governs use of sequence to indicate climax and paragraph sequencing.

Rashi on Gn24-67b explains the sequence in two paragraphs/sentences indicating a cause-effect relationship.
• Gn24-67b. And Isaac brought her into his mother Sarah's tent, and took Rebekah, and she became his wife; and he loved her.
• Gn24-67b And Isaac was comforted for his mother.

Advanced Rashi: Rashi can be further understood with the following Zohar: In a mature husband-wife relationship the wife functions in three ways: a) as co-spouse, b) maternally (caring and nuturing) and c) as student and disciple. So I think Rashi's intent here is that Rivkah assumed the maternal caring role of Sarah and consequently since someone else is caring for him - in those situations where caring was needed - therefore, he was comforted on his mother's