The free may (lit., will sometimes) change without prior notice.
My friend suddenly dropped by without contacting me first.
You cannot audit a Japanese class without going through the formal (registration) process.
I put all the examples along with the meaning into flashcards to study just in case you forget. (I suggest downloading the app version for brainscape) With this you can even study on your phone!
Feel free to use this flash card deck I update regularly.
This grammar is really for intermediate-advanced learners. If you are looking to know where to start in Japanese and building a good foundation check out this blog post it.
If you are a person that is looking to have more useful information learning Japanese consider subscribing to this sites mailing list. I make posts about Japanese content frequently.