In this example:
bla bla bla phrase such as even if something like this doesn’t exist bla bla bla.
What can I use to inject my phrase in the middle of the sentence?
- ,phrase, (commas)
- ;phrase; (semicolons)
- —phrase— (dashes)
closed as not a real question by Matt E. Эллен♦, Andrew Leach♦, tchrist, Carlo_R., Daniel Oct 11 '12 at 13:16
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A parenthesis is an interruption. It is a remark which you insert into the middle of a sentence as if you are interrupting yourself.
In writing, the parenthesis is separated from the interrupted sentence using punctuation. You have a choice of several punctuation marks. One of them, the parenthesis, is named for this use.
Here are the marks which are commonly used for this purpose in American English. I also give common American English name(s) for the marks.
Semicolon (;) is not used for parenthesis. It is used more like a period (.), to separate complete sentences.
Style guides such as The Chicago Manual of Style will generally suggest the use of a particular mark for a particular kind of interruption. The square bracket, for instance, is often recommended when interrupting a quotation with an editorial remark:
Assuming you mean what I think you mean, I think dashes are correct here. Brackets would probably work as well in less formal writing.