One of the problems I see and hear in the speech and writing of contemporary native (ab)users of English is a baffling lack of an ability to grasp simple tenses. Example: Writing about an event in the past of a character,
“If he knew, he probably would think twice.”
#gagamaggot
No, “If he had known, he probably would have thought twice.”
OK, even that construction is a wee tad stupid as a statement, but at least it would have properly reflected the circumstances the writer attempted to convey. (Better: “In hindsight. . . ” but the writer’s vocabulary didn’t seem to stretch that far, if other text is any indication.)