a contraction that means both it is and it has.​

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examples: Can you believe it's been raining all week?

I don't know why it's so cold today!​

It's

Its

Its is used to indicate possession.

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example: The cat hurt its foot.

​ The dog lost its way.

its' or its's

These are NOT grammatically correct.

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They are an abomination.

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You should never write this. ​

Interrupters

A word that significantly breaks the flow of a sentence

Jerome's calculus professor usually piles on the homework. Tonight, however, Jerome has only five problems to solve.

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Some text here about the topic of discussion

How to punctuate

Use commas to separate the interrupter from the rest of the sentence​

Jerome's calculus professor usually piles on the homework. Tonight, however, Jerome has only five problems to solve.

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See? Two commas...one before and one after the interrupter!