TEAS Punctuation Rules

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Period

Used whenever sentence is finished/complete.

Comma

After introduction clause, directly addressing someone, around words that interrupt a sentence/additional info that is not needed, with names and titles, in between direct quotations, and in parts of an address, dates, and places.

Semicolon

1. to separate independent clauses that are not joined by a conjunction such as and or but.
Working the night shift is exhausting; working the morning one can be also.
2. To separate independent clauses when one or both of them contains a comma
After the needle was in, the nurse planned to add a unit of blood; but she had to go check the patient's blood type first.
3. To separate independent clauses when the second clause begins with a conjunctive adverb such as however, nevertheless, moreover, consequently, or for example.

Colon

1. Before a list
2. Before a long quotation
3. After the salutation of a business letter

Quotation Marks

Remember that the commas and periods stay within the quotations. For example:
"Mr. Mark," said Troy, "your test was negative."

Question mark/Exclamation Point

Question mark- Direct question
Exclamation Point- Emotional statement

Parentheses

used to set off generally nonessential info.

Apostrophes

1. To show possession or ownership
2. to show the plural form of lowercase letters
3. To show where a letter or number has been omitted, during contrations

pronouns hers, theirs, yours, ours and its

have no apostrophe when writing about possession

Hyphens

When compounds appear as adjectives before nouns, use a hyphen to avoid misleading the
reader. Therefore, write
Reaction-rate measurements
argon-ion laser
photoelectron-spectrometer design

Capitalizing Every Part of an Experiment, Theory or Design

Capital letters also increase the complexity of writing. Although you must use capital letters for
proper nouns and the beginning of sentences, you should use lower case letters whenever
possible.
Wrong:
In our Liquid Sodium Receiver Experiment, a Power Production Phase will follow the Test and
Evaluation Phase.
Right:
In our liquid sodium receiver experiment, a power production phase will follow the test and
evaluation phase.

"Which" for "That" and Vice Versa

We will use the IR spectrometer that has the higher wavelength accuracy. (Tells which one.)
We will use the FTIR spectrometer, which has a higher wavelength accuracy than a dispersive
IR spectrometer. (Adds a fact about the known option.)

Comma Splice

Incorrect:
The teaching assistant had explicitly warned all the students not to make that particular mistake,
however, several students didn't go to the pre-lab discussion so they made the mistake anyway.
Correct:
The teaching assistant had explicitly warned all the students not to make that particular mistake;however, several students didn't go to the pre-lab discussion so they made the mistake anyway.
The teaching assistant had explicitly warned all the students not to make that particular mistake.
However, several students didn't go to the pre-lab discussion so they made the mistake anyway.

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