I would look at it in a dictionary: Longman Dictionary: never ever (=used to emphasize what you are saying) - I'll never ever forgive him for leaving me. and would take it as an idiom or something, that is, I would use it the way others use it, and it's so because they say so.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousThe dictionary doesn't give much, if any, information about style, register or even the grammar of that item, does it?It doesn't give too much information about any other idiom either. Are you going to complain about at least 10,000 other entries? However, the information it gives about "never ever" is enough for me, and I think it's probably enough
AnonymousPlease tell those of us, who sometimes need more, where and when should or should we not use never ever.1) You don't need more, you are just being overly picky on purpose.
AnonymousIt seems you model the abilities and needs of all ESL students on yourself.That's what you are doing too, except it's never clear what the foudation of your reasoning is, and often also what the actual reasoning is.
AnonymousIt seems you model the abilities and needs of all ESL students on yourself.