このままだと自分だけじゃなくてこの世界壊れるだろう


I would like to understand the meaning of the first part of this sentence, I
get parts but not the whole thing.

> このままだと自分だけじゃなくてこの世界壊れるだろう。

I get that この世界壊れるだろう means this world will break.

I think まま means as it is, so このまま is something like "as this is". I don't
really know about だと, I assume だ is です and と connects is to the other part of
the sentence. 自分だけ means only oneself but I'm confused about じゃなくて, is this
like じゃない but for some reason conjugated with くて at the end? How does that
change the meaning of じゃない?

I think it means something like "as this is the world will break" but I don't
really know how と自分だけじゃなくて works here.




I believe either が or も is missing after 世界. If you're sure you've copied this
sentence correctly, perhaps it's a simple typo in the original text.

> このままだと自分だけじゃなくてこの世界 **も** 壊れるだろう。  
>  If this goes on, not only me but also this world will break.

  * **このままだと** : "If this goes on...", "At this rate...", "If nothing is done..." 
    * このまま: "the same state as this/now". See [this](https://japanese.stackexchange.com/a/48381/5010).
    * だ: "is" (copula)
    * と: conditional と. "when", "if". See [this](http://www.guidetojapanese.org/learn/grammar/conditionals).
  * **自分だけ** : "only me"
  * **AじゃなくてB** ≒ AではなくてB: "not A but B" 
    * じゃ is colloquialism for では.
    * なくて is the te-form of ない. You can also use the ku-form (なく) here.
  * **AだけじゃなくてB** ≒ AだけではなくてB ≒ AだけでなくB: "not only A but also B". See [this](http://japanesetest4you.com/flashcard/learn-jlpt-n2-grammar-%E3%81%A0%E3%81%91%E3%81%A7%E3%81%AA%E3%81%8F-dake-de-naku/) and [this](https://japanese.stackexchange.com/q/8280/5010).
  * **も** : "also"
  * **壊れるだろう** : "... will break". Note that 壊れる is an intransitive verb and never takes を. The transitive version is 壊す.

So let's get used to this "not (only) A but (also) B" pattern, which is very
useful and important!

