If I read a sentence and think it's missing something like ''too'' or a plural "s'', would it be a syntactically or pragmatically ill-formed sentence?
As much as it deals with grammar, sometimes you have to count on your previous knowledge and you may be grammatically wrong but that's how you know it ... does it make sense? No, that doesn't make sense. I don't know what you mean.
I eat much food. This is unnatural. We don't usually use "much" in a statement unless it's negative or accompanied by "too".
I eat too much food.
These box are heavy. This sentence is grammatically incorrect. You can't use "These" before the singular "box".
These boxes are heavy.
Is it a syntactically or pragmatically ill-formed sentence? What does "it" refer to? You posted four sentences.
Student or Learner