I hope the topic makes sense (beginner here!) please could someone explain to me when you would use yaru and when suru? Both seem to translate the same! Thank you
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I understood the title although I’m fairly sure it’s not the right way to say that, but I won’t attempt to correct it and get it ever wronger.
There are many nuances to やる but when it’s used in place of する it’s generally rude or familiar. There’s a lot more to it than than and many constructions that call for one or the other to mean all sorts of things, but I think that’s a good place to start.
If you want more details you can have a look at this for instance:
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Suru is neutral, yaru is with added disdain or taking something lightly… you’d use it when feeding the dog, or a fish, or giving something to some being of no importance. Or telling your anime opponent you’ll crush them using yaru to let them know how lowly you think of them.
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Oh dear!! Thank you for working through my mistakes and replying anyway!
Oh, that’s fascinating, thank you so much. I’m glad I checked before using, my guess was also completely wrong!
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Yeah in this vein you can use やる more like you would あげる to mean “do something for someone, but arrogantly”.
There apparently has been a semantic shift with やる and あげる, both becoming more rude with time. At least that’s what bunpro says:
Unfortunately, てあげる can sound quite patronizing in modern Japanese, and should be avoided in situations where someone may take offence to having something done for them (for example, doing something for someone of higher status). This is primarily due to やる (a casual variation of ‘to give’) being phased out.
Originally, やる was used when referring to giving water to plants, or feeding animals. However, some people started using あげる for these purposes as well, believing that it sounded ‘nicer’. Historically, this actually achieved the opposite result, and some people began to think that あげる was insulting, as it was being used for plants/animals.
These days, てやる is almost never used, unless you have a very close relationship with someone and are using it jokingly.
I think that last sentence refers mostly to “real life” Japanese, because てやる is certainly something you find in manga/videogames/anime.
This language is so subtle. I love it! The examples are helpful, thank you so much!
Huh. So interesting. So much to take care over too! Thank you for sharing the link too 
There are a few issues, but I think the biggest thing would be using brackets for clarity
「やる」と「する」
It lets the reader know that those aren’t functioning as their normal verb roles and interacting with と like it’s a conditional particle.
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A few issues, oh dear 
. Easy win with the brackets though, thank you and I will keep working on my grammar! Appreciate all your help