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The -s ending in English serves four purposes.

Possessive
Plural
Subject Verb Agreement
Contractions

Nouns:

If you add an -s ending to a noun, you can make the noun possessive ('s) or plural (-s, -es, -ies).

Verbs:

When you add a noun to a verb, you are either creating a contraction ('s = is or has), or you can make your verb agree with the subject in the present simple third person singular.

-s Ending 1

Directions: Decide whether the –s endings in the following sentences form the plural, the third person singular verb, a possessive, or a contraction. Circle the correct answer.

1.	He’s invited to the party. plural third person singular possessive contraction
2.	They’re bringing Susan’s car. plural third person singular possessive contraction
3.	The storm covers the entire west coast. plural third person singular possessive contraction
4.	She’s going to have to work very hard. plural third person singular possessive contraction
5.	There are major challenges ahead. plural third person singular possessive contraction
6.	His mom challenges him to work very hard. plural third person singular possessive contraction
7.	The debate’s almost over. plural third person singular possessive contraction
8.	The debate’s topic was the economy. plural third person singular possessive contraction
9.	He’s had the flu twice this year. plural third person singular possessive contraction
10.	He has a migraine headache now. plural third person singular possessive contraction

Answers