
Alisa D. answered 04/15/20
English Tutor - Experienced and Cambridge Certified
I'm in the 9 - 10 parts of speech camp, myself. When I trained to be a certified ESL teacher, we learned that there are 9 parts of speech.
In addition to the 8 listed above by my colleagues, you can add ARTICLES (those evil little English language %#*s!) A, An, and The
Also, EXPLETIVES. Now an interjection MIGHT be an expletive, or it might not. Curse words are generally considered expletives, and can also be an interjection.
Example: Ah = interjection
Damn! = Expletive