How many punctuation marks are there in English grammar?

That's a tricky question! There isn't a single, definitive answer because it depends on how you define a "punctuation mark." Here's a breakdown:

Commonly Recognized Punctuation Marks (around 14):

* Period (.)

* Comma (,)

* Question Mark (?)

* Exclamation Point (!)

* Colon (:)

* Semicolon (;)

* Apostrophe (')

* Quotation Marks (" ")

* Hyphen (-)

* Dash (—)

* Parentheses ( )

* Brackets [ ]

* Ellipsis (...)

* Slash (/)

Less Common or Specialized Punctuation Marks:

* Em Dash (—)

* En Dash (-)

* Asterisk (*)

* Dagger (†)

* Double Dagger (‡)

* Section Sign (§)

* Pilcrow (¶)

* Interrobang (‽)

Beyond Punctuation:

You could also argue that other symbols used in writing like the percent sign (%), dollar sign ($), and ampersand (&) function as punctuation.

So, the answer depends on what you consider a "punctuation mark." The most commonly recognized set includes around 14, but there are many more specialized symbols that could be considered.