I can't recall the last time I scrolled through Facebook and didn't come across at least a dozen grammatical inaccuracies. I've read things from "your welcome" to "I be at the store if anyone need somethin," and I am always left with a furrowed eyebrow and a slight headache. Perhaps the worst part is that it's people my age, from my generation, making all these nettlesome mistakes. Whether it's laziness or just a general lack of knowledge, here is a list of grammatical and punctuation mistakes you shouldn't still be making by the time you reach your 20's.

Incorrect placement of commas.

This, can be, using way too many commas, or not using any at all so your whole sentence is one ginormous mega-clause which actually leads me right into my next point which is about run-on sentences.

Run-on sentences.

You know them when you read them basically they are the sentences that never end and most of the time don't have any punctuation, but sometimes they do; but they still go on way too long, so they are classified as a run-on.

Not knowing the difference between “there,” “their,” and “they’re.”

This, as well as #4, seems to be just basic 101 grammar you should have learned in elementary school. That's where I learned it, and since it seems to be people from my generation who have the greatest difficulty discerning the difference, I find it hard to understand why their still using these so incorrectly.

Not knowing the difference between “your” and “you’re.”

See #3. The "'re" stands for "are." You are. They are. We are. What do you think the apostrophe "re" stands for???????????

Not knowing the difference between “who” and “whom.”

Who refers to the subject of the sentence.

Whom refers to the object of the verb or preposition.

If you need more help, here's a dandy little cheat sheet.

Not knowing the difference between “then” and “than.”

Then is used to indicate time.

Than is used to make comparisons.

Here's another cheat sheet to help.

Putting a period outside a quotation mark.

Nope. Just nope.

Wrong: "Stephen," she remarked, "you need to go buy more hot sauce".

Right: "Stephen," she remarked, "you need to go buy more hot sauce."

The period belongs to the words inside the quotation marks, so it should be there with them.

Starting a sentence with a conjunction, or “because.”

And I know this is a pretty common mistake. But you need to stop doing it. Because it's incorrect, on so many levels.

Starting every sentence with the same word.

Pretty self-explanatory. If you're writing with personal pronouns, please don’t start every sentence with “I,” or "he," or "you," etc. etc. It makes for a thoroughly boring read.

Repeating your transition words.

“Secondly,” “Lastly,” “In addition,” and “For example” are perhaps the most used and least captivating transition words in the English language. For example, try ones such as “Furthermore,” “Comparatively,” "Additionally,” or “Overall.” Also, don’t overuse the word “also,” and lastly, if you’re writing something more formal, don’t use it at all.

Don’t use “very” all the time.

This isn’t so much a mistake as it is very lazy. We live in an era ripe with technology. Go online, use a thesaurus, and find yourself a better word.

Not knowing the difference between a colon (:) and a semicolon (;).

Both are used to separate clauses in a sentence.

More specifically, colons are used to join a main clause with a noun (such as a name or a list of things), and semicolons are used to join two independent (this means they can stand on their own as a complete sentence) clauses.

Again, cheat sheet.

Not realizing when your “sentence” is actually just a fragment.

You wrong.