Thank you, nekojita! This is exactly what I needed to know (what I have done wrong on the page).
I heed your advices and made changes to the page as you pointed out, with minor questions:
1. I have changed from "benkyo" to "benkyō". I should use "ō" for long vowels, but sometimes I do not know when should I do it (lengthen the sound).
2. "kinou/ginkou", do you mean they should be spelt differently?
3. I have changed "ku-ji" to "kuji", yes they do look better now.
4. I use "paatii" (instead of pātī) for "Party" since it is of foreign origin.
5. I have made the following more formal (with help from Google):
sasotta -> sasotteimashita
benkyo shita -> benkyō shimashita
kaetta -> kaerimashita
matte iru -> matte imasu
tsuita -> tsukimashita
So there you go, the updated page:
xleeque.com/articles/particles-in-japanese-language.aspx
Thanks again for your help, without which my page is misleading!