-s
- forming the plural of most nouns: hips, shoes
- forming the 3d pers. sing., pres. indic., of certain verbs: shouts, gives, runs
- forming some adverbs: betimes, days
- forming the possessive singular of most nouns and noun phrases and of some pronouns: a child's game, the defense attorney's case, the Senator from Maine's bill, one's own ideas
- forming the possessive plural of nouns whose plural does not end in s: a children's dictionary
- is: he's here
- has: she's done it
- Informal does: what's it matter?
us: used with the verb let in the contraction let's
forming the possessive plural of most nouns: cats' whiskers, the Johnsons' children, Americans' eating habits
See -s in American Heritage Dictionary 4
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