Here's a quote from the film theorist Colin MacCabe, from 1975. Why are academics sometimes the most inarticulate people... like... ever...
(bear in mind that this is a single sentence)
"The problem is to understand the terms of the construction of the subject and the modalities of the replacement of this construction in specific signifying practices, where “replacement” means not merely the repetition of the place of that construction but also, more difficultly, the supplacement—the overplacing: supplementation or, in certain circumstances, supplantation (critical interruption)—of that construction in the place of its repetition."
If I have any aim as a film theorist, it's to not write like this. I realise that the sentence before this one is a bad one, but I did it on purpose. It's also because I've been marking essays, some of which those essays are written with bad english that makes my writing now bad.
The funny thing is that I can't always tell what it is that makes a sentence a bad sentence or poor grammatically I just know when I see it but I know that poor punctuation has a lot too do with it also sentences that are too long also where the same word it used twice in the same sentence (like the sentence just before this one where I said sentence twice)