I am wondering should I always use a comma before using 'such that' or not?
sentence 1 , such that sentence 2.
More clearly, I just wrote the following sentences in order to lighten the point, whereas I normally want to know the general idea of it.
Please leave the kitchen door open [,] such that they can come in from the garden.
It certainly is possible to adapt these new concepts [,] such that they can also handle more complex tasks.
Additionally, I leave out the comma in such sentences.
Best Answer
This problem has to do with the use of commas, and not so much with the phrase "such that". "Such that" is considered equal to "so that" in meaning, but "so that" is more common and preferred. "Such that" is really formal.
Commas are usually used to separate independent parts of a sentence. Because of the dependence that "such that" and "so that" have on the phrase before it, the comma is not used there.
Now, some people like to put commas where they pause in speaking in order to separate ideas. And this is only correct if it is truly separating two ideas, and not just to add a pause.
Adding a pause in speech to separate ideas would be the only correct reason to put a comma before "such that".
Putting a comma before "such that" and "so that" isn't wrong, but it is unnecessary.