It's vs Its
These two English words are very often used incorrectly by native speakers. It's important that you understand the difference.

It's is a contraction of "it is" or "it has."
  • It's time to go.
  • Do you think it's ready?
  • I read your article - it's very good.
  • Do you know where my purse is? It's on the table.
  • It's been a long time.

Its is the possessive form of "it."
  • That's an interesting device - what is its purpose?
  • I saw Les Misérables during its initial run.
  • This stove has its own timer.
  • The bird lost some of its feathers.
  • Where is its head office?

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