Its or It's? When to use an apostrophe

source: Simple English Videos       2018年3月9日
We write 'it's' with an apostrophe when it's a contraction of 'it is' or 'it has'.
We don't use an apostrophe when 'its' is a possessive pronoun.
I think people muddle them up because they confuse possessive nouns with possessive pronouns. We explain the difference in this video, and also show you how not to rob a bank.