In English, * * * has 14 punctuation marks, which are: period? (period? ), question mark? (question mark), exclamation point (exclamation point),? Comma (comma), semicolon (semicolon), colon (colon).

Dashes (dashes), hyphens (hyphens), parentheses (parentheses), brackets (parentheses? ), braces (brackets),? Apostrophe (apostrophe; ? Omitting symbols; ? Possessive symbol), quotation marks (quotation marks) and ellipsis (ellipsis).

Usage of apostrophe (')

Apostrophe or apostrophe (')

1 constitutes the possessive case of a noun.

Let my son rest.

A moment's book

Three weeks' salary

2. Represents the plural form of words, letters, numbers, symbols, etc.

Don't use so many and in the sentence.

How many fives do you have?

This is different from the plural form of ordinary words. Formal writing must begin with "",and remember these rules.

In addition to the abbreviated form of verbs, it also indicates the omission of one or more letters and numbers.

I see. "Yes, madam," said the waiter.

Note: A considerable number of omitted words are used in spoken language and should not appear in written language. I am willing (I am willing to write in written language).