It has even been said that the Chinese language has no grammar system as such, that is, no system when using, say, the English or French systems as yardsticks.
Quote:- "...mix terms and knowledge of several grammar systems to explain Chinese sentences ..."
Why is that the case?
Well, just look at what the top echelon officials of the Chinese Communist Party wear, these officials being held out as the epitome of "Chinese-ness"? They wear immaculate Western suits, in case no one notices.
Does it mean a 5000 year old Chinese civilization, (a common patriotic boast you hear all the time), has no national dress of its own? Even some "primitive" tribe in darkest Africa has a national dress, often seen at the United Nations.
Now look at some old classical Chinese writings. Grammatical by English grammar standard? Definitely not. They don't even have punctuation marks.
Any artificial transplantation of an alien grammar system onto another, (being civilizations apart), because of the perceived notion that one is "superior", or "more logical", or "have better linguistic sophistication", would result in the "problem" you are encountering.
All this happens because of the historical circumstances of the last 400 years in opening up old China to the new West. Even when the Chinese wanted to have a "pinyin" system to make it easier to teach their own people, they needed the English alphabets. Ironically, the Pinyin system actually benefits non-Chinese learners more.
So, ever wonder why English grammar is used to explain / analyse the "grammar" of the Chinese language, the so-called "Anglicization" of the modern Chinese language to the point where if somehow a Chinese sentence is "off" by a misplacement or absence of a verb or adverb, the adjective is placed at the end of a sentence, it is "ungrammatical" How many contributors here born in the 1940s and 1950s actually studied such kind of grammar in school, in or out of mainland China?
Please, I am not making a judgmental assumption of the situation as I see it. There is no "good" or "bad", "right" or "wrong" dissection tool available to push one agenda or another. Just like the Universe, it is what it is. History, like Time, is unchangeable and unstoppable.
In any case, the Chinese language has evolved over the last few thousand years; why should it stop now?