Writing Mechanics
Essential punctuation, capitalization, and spelling rules for effective writing
What You'll Learn
Punctuation Rules
Proper punctuation is essential for clear communication. Each punctuation mark serves a specific purpose in organizing and clarifying written text.
End Punctuation
Period (.)
Use at the end of declarative sentences and most imperative sentences.
The student completed the assignment.
Please close the door.
Question Mark (?)
Use at the end of direct questions.
What time does class start?
Did you finish your homework?
Exclamation Point (!)
Use to show strong emotion or emphasis. Use sparingly.
Watch out!
What an amazing performance!
Comma Rules (,)
The comma is one of the most frequently used - and misused - punctuation marks.
1. Items in a Series
We need pencils, paper, and erasers.
2. Before FANBOYS (coordinating conjunctions)
I studied hard, but the test was difficult.
3. After Introductory Elements
After the bell rang, students went to class.
4. Around Nonessential Information
My teacher, who is from Texas, speaks Spanish.
5. With Addresses, Dates, and Numbers
Houston, Texas, is a large city. / January 15, 2024
Apostrophe and Other Punctuation
Possession (')
Singular nouns: Add 's
The student's book
Plural nouns (ending in s): Add only '
The students' books
Plural nouns (not ending in s): Add 's
The children's playground
Contractions (')
Replace missing letters:
don't = do not
it's = it is (NOT possessive)
they're = they are
won't = will not
Common Mistake: its vs. it's
its = possessive (The dog wagged its tail.)
it's = it is (It's a beautiful day.)
Quotation Marks (" ")
- Direct speech: She said, "Hello."
- Titles of short works
- Periods and commas go inside
Semicolon (;)
- Join related independent clauses
- I studied hard; I passed.
Colon (:)
- Introduce lists
- Time: 3:30 p.m.
Hyphen & Dash
- Hyphen: compound words
- Dash: interruptions
Capitalization Rules
Proper capitalization helps readers identify important words and the beginnings of sentences.
Always Capitalize:
1. First Word Rules
First word of sentences, quotes, and after colons
2. Proper Nouns
Names, places, organizations, brands
3. Titles & Positions
Before names: President Lincoln (not "the president")
4. Time & Calendar
Days, months, holidays (not seasons)
5. Academic Subjects
Languages (English), specific courses (Biology 101)
6. Other
Pronoun "I", nationalities, religions, historical events
Spelling Rules and Patterns
I Before E Rule
I before E except after C, or when sounding like A.
I before E:
believe, field, piece
After C:
receive, ceiling
Exceptions: weird, science, neither
Doubling Final Consonants
Double when: single vowel + consonant, one syllable or stress on last, suffix starts with vowel.
run → running, begin → beginning
Changing Y to I
Change Y to I when adding suffixes, except before -ing.
happy → happiness
carry → carrying
Silent E Rule
Drop silent E before adding a suffix that begins with a vowel.
make → making, hope → hoping (but hope → hopeful)
Commonly Confused Words
their = possessive
there = location
they're = they are
your = possessive
you're = you are
to = direction
too = also/excessive
two = number 2
affect = verb
effect = noun
than = comparison
then = time
lose = verb
loose = adjective
Tips for Mastering Writing Mechanics
Read Actively
Pay attention to punctuation and capitalization in quality writing.
Practice Pattern Recognition
Look for spelling patterns in word families to spell unfamiliar words.
Keep a Reference List
Create your own list of commonly confused words and tricky rules.
Edit Student Work
Practice identifying mechanical errors in sample student writing.
Key Takeaways
- ✓ Master comma rules: series, conjunctions, introductory elements, nonessential info
- ✓ Know the difference between its/it's, their/there/they're, your/you're
- ✓ Capitalize proper nouns, titles before names, days/months/holidays
- ✓ Apply spelling rules: i before e, doubling consonants, changing y to i
- ✓ Practice identifying mechanical errors in student writing
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