It's an interesting question. Water fountain or fountain (a bit vague) are correct for a static fountain. If it had sculptures it would called a water fountain with sculptures or maybe a sculpture fountain. If there is an element that is show-like, for example lights, music, motion, etc., then it would qualify as a show, a water fountain show or fountain show. The show could be scheduled, random, or constant, and still qualify as a show. Water show, unfortunately, is too broad. It could mean a show of boats on a lake, like the annual Chicago Air & Water Show. Water show alone does not refer to a water fountain show effectively enough to be recognized. Though, to be frank, I think many people will use it that way and rely on context to make it clear. Notably, Misaka Park, Japan, names theirs, Misaka Park Water Show. They appear to be almost entirely unique, globally, in their use of this name, including in English, French, and Spanish. It's such a minor thing, without any hard rules, I doubt anyone would give it a second thought, however, "unusual," in the native English speaking world.

There are many sports in my county, but the most popular is ping-pong, enjoyed by both older and younger players. If you go to almost any neighborhood in China, you will see many people playing ping-pong. It is typical to see an older opponent playing a kid who may also be a friend.

My students typically appreciate the detailed way I break down idioms including the origins and deeper meaning. As a result, students also tend to retain the knowledge more effectively due to having a better understanding of the underlying context. Please schedule a time if you believe I could be of assistance.

The use of muddy is a little misleading here. Typically ground, in this use, refers to covering a quantity of area or a distance. For example, "Everyone please settle in to your seats. We have a lot of ground to cover in today's meeting." The word muddy eludes to the idea of working in the literal ground/earth/dirt/soil. The allusion to ground could still refer to an area or distance, making the use of muddy hand simply extra information about the state of the individual's hand as a result of working in a muddy area or some length of distance in the mud.

I am thankful to have the ability to freely communicate in my second language. There are so many people that can’t express their true thoughts due to political restrictions. Thus, feeling free to say things out loud is not something I take for granted.

Honestly, I probably shouldn't answer without really, really knowing. That being said, there is the possibility that "gotten" may be needed. It's the past participle, I believe. So, if you're referring to the past, such as what may be the case in the last example, you may want to use "gotten" instead. Both may be correct. What you wrote is more frequently used, whether correct or not.