Some possessives use an apostrophe, while a few do not.
Its is not the plural form of
it (this is possible, but that is an unusual usage of the word, and will most likely be covered later).
Its is the possessive form.
When speaking about a dog, for instance, you might say 'This dog has lost its collar!' but another way to express the same thing is to say (or write) 'The dog's collar was missing.'
When a girl or a woman has something, it is her or hers. For example: That is her camera. or That camera is hers. We might say 'that camera belongs to her. She owns the camera.
With a boy or a man, we would say That is his camera. or That camera is his. We could also say 'That camera belongs to him He owns the camera..
Other possessive words are ours, our, theirs, their, mine, my, your, and yours.
The subject determines which form, and the possessor determines which possessive word you should use.
Here are some examples:
Those are ours.
Those are our cameras.
Those cameras are ours.
That is our camera.
******
Those are theirs.
Those are their cameras.
Those cameras are theirs.
That is their camera.
******
Those are mine.
Those are my cameras.
Those cameras are mine.
That is my camera.
******
Those are yours.
Those are your cameras.
Those cameras are yours.
That is your camera.
If you paid attention very closely, you may have noticed that the sentences with your and yours matched up with the sentences that used our and ours. All that was different in those written sentences is that there is a 'y' in the 'your' and yous' sentences.
Just remember, 'your' and yours' do not rhyme with 'our' and 'ours'! 'Your' and 'yours' rhymes with 'ore' and 'ores' (like iron ore, or silver ores, in the ground), and 'our' and 'ours' rhymes with 'hour' and 'hours', which are time words.
In the Midwest, 'hour' rhymes with 'shower'. 'Our' and 'ours' rhyme with 'shower' and 'showers'.