Is it "its a dog" or "it's a dog"?
"It's a dog." The phrase is a contraction of "it is" — the apostrophe belongs.
A little morei
Say it out loud: it is a dog — that reads naturally, so the contracted form it's is the right one. Its a dog has no apostrophe and reads as though "its" is possessing something that never arrives.
The full entryii
Punctuation
Its vs. It’s
Possessive versus contraction — a rare case where no apostrophe wins.
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