Question

punctuation unit test
in 1 - 2 sentences, explain how to use an apostrophe to show possession for singular and plural nouns and to form contractions. (2 points)
short answer rubric (2 points)
points awarded\tcriteria
2\tthe answer is very clear.
the answer is fully supported by details.
there may be a few errors in grammar, usage, or mechanics. errors do not interfere with meaning.

Explanation:

For singular nouns, add 's (e.g., dog's bone). For plural nouns ending in -s, add just an apostrophe (e.g., dogs' toys). In contractions, the apostrophe replaces missing letters (e.g., don't for do not).

Answer:

For singular nouns, add 's; for plural nouns ending in -s, add an apostrophe. In contractions, it replaces missing letters.