I received this inquiry on Facebook:

Here is my reply:

Oh, man.  This is a tough one.

I am not always thankful for English.  But, when it comes to pronouns, I am super thankful for English.

This is one of the times Latin behaves like a two year old.  A bad two year old.

The short answer is, memorize them.

I do not always tell my students to memorize the complicated Latin endings.  In fact, I rather tell my students to read.  Read, read, read.  Read until your brain hurts.  As you read, you will encounter the endings over and over again.  The grammar will sink in.  It takes time, but it happens.

However, when it comes to the pronouns, especially the demonstrative pronouns, I do recommend memorization.

I have started a free YouTube series to help with this process.  I need to finish the section on demonstrative pronouns.  But, this video should get you started: https://www.youtube.com/watch?v=IKgWoRS8vVI

You will also find help at the Latin Tutorial.

Go to the link here, and scroll down the playlist.  Videos 15 – 22 all explain the complicated Latin pronouns.

There is one more step you can take if you have the book Lingua Latina by Hans Ørberg.  Go to chapter 8, find the section Grammatica Latina, and read it multiple times.

If you do not have the book, try this video: https://www.youtube.com/watch?v=6U5igWTbJZM

Of course, if you get stuck, you are always welcome to contact me. Let me know if you need more help!