A compact grammar reference explaining when to use it's, when to use its, and why its' is never invited.
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It puts the contraction and possessive forms side by side with short definitions and examples, which is exactly what a recurring grammar problem needs.
The rule of thumb is practical: if his or her can replace the word, there is no apostrophe.
Its' receives its own section containing one verdict: never correct. Ever. Some lessons benefit from a locked door.
Don't just take our word for it. Experience It's Not Its yourself!
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