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Could you, please, help me out with this sentence

Your dad's bought a car, that's great

Is it correct to use comma before "that"? Would it be better if I separate those 2 halves with a full stop?

Thanks in advance.

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    I would say separate them into two independent sentences because these two statements are complete thoughts that can stand on their own. – Michael Rybkin Jan 24 at 7:08
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As it's written, your sentence is the equivalent of separating two independent clauses with a comma. That's known as a comma splice. While a comma splice is acceptable in some situations, I wouldn't say this is one of them.

There are multiple ways you can deal with this.

1. You can explicitly separate the sentence into two independent clauses with different punctuation:

Your dad's bought a car. That's great.
Your dad's bought a car; that's great.
Your dad's bought a car—that's great.

2. You can turn the second part of the sentence into a clarifying term for the first part with a colon:

Your dad's bought a car: that's great.

3. You can use a comma followed by a conjunction:

Your dad's bought a car, and that's great.

4. You can use a comma but turn what follows it into a nonrestrictive clause:

Your dad's bought a car, which is great.

Note that this leaves the meaning of the sentence ambiguous. It's not clear if it's the fact that he bought a car that's great or if it's the car itself that's great.

5. You can eschew punctuation altogether but make what currently follows it into a restrictive clause:

Your dad's bought a car that's great.

Here, it's clear that it's the car itself that's great, not his purchase of it.


Some of these variations are simply a matter of preference, while others are determined by the exact meaning of what you're trying to convey.

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