Purpose and meaning of やること in correction


I'm trying to understand a correction in a sentence. I wrote:

[code]

    ことをやるクエストがありすぎます。
    
    There are too many quests to do.
    
[/code]

But it has been corrected to

[code]

    1. やるクエストがありすぎます。
    
    2. やることクエストがありすぎます。
    
    3. やることがありすぎます。
    
[/code]

I can understand correction #1 as the こと appears to be redundant. But I don't
really understand correction #2 or #3. Why is `やること` used? I read the `やること`
as `A thing which is done`, but I don't really expect the `こと` at all because
`クエスト` is the specific noun being used. But then also in correction #3 `クエスト`
is completely removed.

So what does `やること` mean? What's the difference between the corrections?




Here クエスト and こと are both just nouns. こと means "thing" and やること means
"thing(s) to do". Whoever corrected your sentence, Sentence 2 is
ungrammatical. Sentence 3 is a correct sentence but it just means "There are
too many things to do".




Here クエスト and こと are both just nouns. こと means "thing" and やること means
"thing(s) to do". Whoever corrected your sentence, Sentence 2 is
ungrammatical. Sentence 3 is a correct sentence but it just means "There are
too many things to do".

