[georgiadevildog]

Absolutely. Drives me nuts.

"The dog was chasing it's tail."

The dog was chasing it is tail?

[ken21]

a friend of mine graduated from a journalism program at a state university. he made the error frequently that you speak of--it's and its.

[rwfromkansas]

Who and whom

Who is SUBJECTIVE
Whom is OBJECTIVE

Using the two terms properly is not difficult.

Just isolate the phrase/clause using who or whom and replace who or whom with a name, such as "Bob." Then, say it as a sentence, which often requires changing the word order. If Bob is subjective, use who. If objective, use whom.

Example:

I wonder who is going to the party.

Next step:

I wonder Bob is going to the party.

Isolate: "Bob is going to the party."

Since Bob is the subject there, it should be who.

Next example:

You are dating whom?

In sentence form, it stays the same....you are dating whom.

You are dating Bob.

Thus, since Bob is objective, we use "whom."