eos-usage

name	eos-usage
description	Strunk & White grammar review using the 11 elementary rules from "Elements of Style" Chapter I. Use when checking mechanics, punctuation, and grammatical correctness.
user-invocable	true

Elements of Style: 11 Rules of Usage

Review writing against Strunk & White's 11 elementary rules of usage from Chapter I.

Instructions

Analyze the provided text for grammatical and mechanical errors. Flag specific violations with line numbers or quotes where possible.

Output Format

Text Under Review: [title or brief description]

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Usage Review

#	Rule	Status	Issues Found
1	Form possessive singular with 's	Pass/Needs Work/N/A	[issues]
2	Use serial comma	Pass/Needs Work/N/A	[issues]
3	Enclose parenthetic expressions in commas	Pass/Needs Work/N/A	[issues]
4	Comma before conjunction + independent clause	Pass/Needs Work/N/A	[issues]
5	No comma splice	Pass/Needs Work/N/A	[issues]
6	No sentence fragments	Pass/Needs Work/N/A	[issues]
7	Use colon to introduce lists/appositives	Pass/Needs Work/N/A	[issues]
8	Use dash for abrupt breaks	Pass/Needs Work/N/A	[issues]
9	Subject-verb agreement	Pass/Needs Work/N/A	[issues]
10	Proper pronoun case	Pass/Needs Work/N/A	[issues]
11	Dangling modifiers	Pass/Needs Work/N/A	[issues]

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Errors Found

Rule 5: Comma Splices

Location	Error	Correction
[line/quote]	"It is cold, we should go inside"	"It is cold; we should go inside" OR "It is cold, so we should go inside"

Rule 6: Sentence Fragments

Location	Fragment	Suggested Fix
[line/quote]	[fragment]	[complete sentence]

Rule 11: Dangling Modifiers

Location	Error	Correction
[line/quote]	"Walking down the street, the trees were beautiful"	"Walking down the street, I noticed the beautiful trees"

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Rule Reference

1. Form the possessive singular by adding 's — Charles's friend, Burns's poems, the witch's malice. Exceptions: ancient proper names ending in -es or -is (Jesus', Moses'), and common idioms (for conscience' sake).

2. In a series of three or more, use a comma after each term except the last — red, white, and blue. The serial comma prevents ambiguity.

3. Enclose parenthetic expressions between commas — "The best way to see a country, unless you are pressed for time, is to travel on foot." If the interruption is slight, commas may be omitted.

4. Place a comma before a conjunction introducing an independent clause — "The early records are obscure, but they suggest..." This rule applies when both clauses are independent (could stand alone).

5. Do not join independent clauses with a comma — This error is the "comma splice." Wrong: "It is cold, we should go inside." Right: "It is cold; we should go inside" or "It is cold. We should go inside."

6. Do not break sentences in two — Avoid sentence fragments. "I met them on a Cunard liner many years ago. Coming home from Liverpool to New York." The second part should not stand alone.

7. Use a colon after an independent clause to introduce a list, appositive, amplification, or illustrative quotation — "The situation is perilous: our enemies are many, our supplies few."

8. Use a dash to set off an abrupt break or to announce a long appositive or summary — "His first thought on getting out of bed—if he had any thought at all—was to get back in again." Use sparingly; frequent dashes give writing a breathless quality.

9. The subject and verb must agree in number — "The bittersweet flavor of youth—its trials, its joys, its adventures, its challenges—are not soon forgotten" is wrong; use "is."

10. Use the proper case of pronoun — "between you and I" is wrong; use "between you and me." In compound constructions, test each pronoun alone.

11. A participial phrase at the beginning of a sentence must refer to the grammatical subject — "Walking down the street, the trees were beautiful" is wrong (trees weren't walking). Fix: "Walking down the street, I noticed the beautiful trees."

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Summary

Grammar Accuracy: [Clean/Minor Issues/Significant Errors]

Most Common Error Type: [error category]

Corrections Needed:

1. [Highest priority fix]
2. [Second priority]
3. [Third priority]

Guidelines

• Not all comma usage is covered by these rules—focus on the specific patterns described
• Rule 2 (serial comma) is a style choice in some guides; Strunk & White advocate for it
• Some fragments are intentional for effect in creative writing
• Technical writing may have different conventions for colons and lists

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