I was so focused on my book that I didn't even hear you coming.
Is there a comma needed before the that? What would be the best way to phrase this sentence?
No, you don't need a comma when the word is that . However, if the word was, "which" it would need a comma. His name was quite cute, which I didn't know when I first met him.
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No, you don't need a comma when the word is that. However, if the word was, "which" it would need a comma.
His name was quite cute, which I didn't know when I first met him.
snow catIs there a comma needed before the that?
No.
snow catWhat would be the best way to phrase this sentence?
It's fine as it is. I'd use 'engrossed in' instead of 'focused on'.