The plural form of the noun blister is blisters.The plural possessive form is blisters'.Example: Do not use the medication if any of the blisters' seals are broken.
medications
Streams. (Emphasis on the "S")
The plural of URL (Uniform Resource Locator) is URLs.
As a collective noun, it's both singular and plural.
The "s" is there because it is plural. Such as, you and I, we are friends. To use it in a non plural would be something like : "I am a friend to him."
You would use s and not es, but this is not the way to make the word plural. You would use apostrophe s to indicate possession. For example, the child's illness had the whole family worried. The plural of child is children.
If a plural noun ends with an -s, just add the apostrophe after the ending -s (s').If a plural noun does not end with an -s (an irregular plural), add the apostrophe -s ('s) the same as for a singular noun. Examples:man; men; men'schild; children; children'sdeer; deer; deer'stooth; teeth; teeth's
Not if it is a simple plural. Simple plurals do not require an appostrophe.
The surname would normally just use an S to form the plural. But names that end in S, or that would be confused with those that end in S, add ES.
In the case of the possessive apostrophe, it is 's in the singular and s' in the plural use.
When the subject is I or a plural noun.