I cannot really understand the difference (if there's a difference) between :
He gets along fine with it
and
He gets by fine with it
And what about
"get on" ?
I cannot really understand the difference (if there's a difference) between :
He gets along fine with it
and
He gets by fine with it
And what about
"get on" ?
If you get along with something (or more usually, somebody), that normally implies you interact at least reasonably well with it/them. The emphasis is on the nature of the relationship (which is usually implied to be adequate, but not amazingly good).
If you get by with something this normally implies that you're using it. And that even though you know there are other/better things you could use, the one you're actually using is good enough for you (the emphasis is on its adequate functionality).
Thus you wouldn't normally say "I get by with John" except in a context where John performs some service for you. Often, by implication, a service someone else could do better, but for some reason you use John (he's cheaper, perhaps).
In this specific context, to get on with someone is similar to getting along with them, but usually the implication is the relationship is good, rather than just "adequate").
Or I could say "I really get off on [good food, jazz music, westerns, etc.]". That would mean I really, really enjoy it (sometimes implying that I get a sexual kick out of whatever it is).