Capitol/capital

 

Double negatives: I don't need no money. Drives me crazy.

Not technically grammatical in nature, but:

 

I bought some Havarti the other day. A couple days later, my sister asked if she could try some Haverty cheese. It took a bit of back and forth before we got that one straight.

Same sister was in Cleveland last week and went to an Italian restaurant. She sent me a text asking what to get. Knowing her, I said go for the lasagna...and order a glass of Chianti. The cheese incedent popped into mind, so I sent her the phoenetic of Chianti. Too late. She'd already ordered the Chi-ant-eye instead of the key-aahn-tee.

And it's ridiculous how often ridiculous is spelled "rediculous"...you're not doing diculous again.

If I remember correctly, flammable and inflammable mean the same thing. Since I am not sure, I try to avoid using either one.

Using axe and ast instead of ASK. Those grind me a little.

Affect/effect

Affect/effect

 

My personal Kryptonite, I screw those up more than any other words.

Insure/ensure.

Insure - arrange for compensation in the event of damage to or loss of (property), or injury to or the death of (someone), in exchange for regular advance payments to a company or government agency.

 

Ensure - What mcpapa drinks for his daily sustenance.

I need to insure my car.

Mcpapa's favorite drink is Ensure.

Oops, you beat me to it.

To vs. too. Argggggg.

To vs. too. Argggggg.

To add to that, to vs. too vs, two. Double Argggg.

Irregardless

 

My co-worker uses that every day.

A lot of personal favorites already mentioned in this thread.

 

I am amazed at how many people type "are" when they mean "our". Not even close, so how does that happen?

 

One misuse I see a lot is accept/except.

"I could care less".

 

Yes, you could.