It’s/its
The most important thing to remember is that there is no such form as it’s’. Its is one of a few words that are already possessives, and do not, therefore, need an apostrophe adding to them. These words are
my/mine its
your/yours our/ours his their/theirs
her/hers whose
As we noted in the last passage, it’s is two words (‘it is’ or ‘it has’) contracted into one: it has nothing to do with the possessive. It’s is used in a large number of situations, but ... Read more...