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Apart from in Australian [0] and Canadian [1] English, where it is generally optional, but used where it can increase clarity or meter.

[0] Australian Government Publishing Service's Style Manual for Authors, Editors and Printers, ISBN: 978 0 7016 3648 7

[1] The Canadian style: a guide to writing and editing https://archive.org/details/canadianstylegui0000unse

by pipe0110 hours ago|

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As a non-native English speaker I'm always so self conscious when using commas, it feels like I'm always using either too many or too few

by john_strinlai10 hours ago|

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i dont think anyone actually cares unless you are in english class or someone wants to feel smug on the internet (you can ignore the 2nd one completely).

by GrantMoyer9 hours ago|

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Informally, commas are "misused" regularly even by native writers, and almost no one notices or cares unless the misuse is frequent and egregious.

Formally, most comma use is an issue of style, not grammar, and style guides differ on when they should and shouldn't be used. The main rule that's actually a matter of grammar is this: commas cannot be used to join two "clauses" (phrases which could be independent sentences) without a conjunction.

by Joker_vD9 hours ago|

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So putting the commas in "I'm eating a hot dog, she's listening to radio, we are having a wonderful time." is grammatically wrong? TIL, I guess.

by GrantMoyer8 hours ago|

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English has no central authority, so the lines between grammar and style can get fuzzy. Most guides would say you need an "and" after the second comma, but some make an exception if the clauses are "very short and alike in form". See Wikipedia's article Comma splice if you are interested in the pedantics. https://en.wikipedia.org/wiki/Comma_splice

by Joker_vD7 hours ago|

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You still didn't answer: am I supposed to write "I'm eating a hot dog she's listening to radio" without a comma for that sentence to be grammatical? Or am I supposed to always insert "and" into it?

by GrantMoyer6 hours ago|

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With or without a comma, without a conjunction like "and" the example is a run on sentence and is ungrammatical. You should join the clauses with a conjunction, and including a comma before the conjunction is a common style.

There's a caveat where some style guides permit using a comma without a conjunction in specific contexts, but most don't.

by zulux10 hours ago|

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Don't worry about it.

The lack or excess of commas doesn't upset any reasonable person in the slightest.

by steele10 hours ago|

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You're doing fine. English grammar pedants speak infrequently. Mostly due to the disinterest of the listener.

by tenuousemphasis10 hours ago|

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As a native English speaker, same.

by sarchertech10 hours ago|

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You do need a comma before a conjunction if it connects two independent clauses.

by Joker_vD10 hours ago|

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So it's "You do need a comma before a conjunction, if it connects two independent clauses" then — "you need a comma before a conjunction" and "it connects two independent clauses" are two fully formed simple sentences, each having its own subject and predicate. See what I mean?

And almost nobody writes sentences like "I love her and she loves me back" with a comma before "and".

by sarchertech4 minutes ago|

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>If

A subordinating conjunction like if turns an independent clause into a dependent clause, so you don’t use a comma.

> And almost nobody writes sentences like "I love her and she loves me back" with a comma before "and".

In informal writing, people frequently leave out commas for everything but lists.

But it’s also very common to see it used “correctly”. In any kind of writing where someone would be expected to proofread what they wrote, I’d expect it.