I'd really appreciate it if you could help me understand between these two sentences.
"Each child got a present" and " Every child got a present"
I really don't feel much difference at all. Using "each" does emphasize that the presents were individual. (If a brother and sister got a joint present, say a game system, then every child still got a present, but theirs was a sharedone.)
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.