Study each question and option carefully and pick one with correct punctuation.
1. He has a _____ son.
two, year old
two year-old
two-year-old
When the adjectival phrase (2-year-old) comes before the noun it modifies (son), it’s hyphenated.
2. He got three A’s last semester but his one downfall was Physics.
semester but, his
semester, but his
We use a comma before conjunction to connect two independent clauses.
semester, but, his
3. This is what you’ll need to buy a notebook, a box of diskettes, and some paper.
to buy;
to buy,
to buy:
We use a colon [:] before a list or an explanation that is preceded by a clause that can stand by itself.
4. “My Old Kentucky Home a tune by Stephen Foster, is Kentucky’s state song.
Home” a tune
Home”, a tune
Home,” a tune
Periods and commas go inside quotation marks. And we need a comma here to set apart a parenthetical element. (“A tune by Stephen Foster”)
5. My pin number has two 5s. It’s easy to remember.
5s
We don’t need to use apostrophe [ ‘ ] in this sentence. Apostrophe is used to indicate possessive case, contractions, or omitted letters.
5’s
5s’
Source:
- http://grammar.ccc.commnet.edu/
- http://grammarist.com/style/ages-hyphenation/
- http://www.niu.edu/index.shtml
Compiled and written by @AnienditaR at @EnglishTips4u on Saturday, March 5, 2016
Related post(s):
- #EngClass: Punctuation
- #GammarTrivia: Hyphen, en-dash, and em-dash
- #GrammarTrivia: The use of colon (:) and semicolon (;)
- #EngClass: Sentences
- #EngQuiz: Fix the grammatical mistakes
^MQ
@EnglishTips4U 
Some mix up there, in no.3 & 4
There is a mistake in the Explanation un number three and four. They are in the wrong place. They need to switch places