People often use its or it’s in their sentences but readers and listeners usually find it hard to understand which ‘its’ they are using in their sentences. Actually, it’s not very difficult to know which word being spoken or written as long as we understand the situation:
1.‘Its’ is a possessive word, just like my or your; it means that something owns something or something belongs to it.
The car was badly damaged but its driver escaped unhurt.
The dog went back to its house.
The house and its garden are a popular tourist attraction.
2.We can only use it’s if it is the short form of it is or it has (been).
Here are some examples:
When you go abroad, it’s a good idea to take a guidebook with you.
(… it is a good idea…)
It’s his book that we are discussing right now.
(It is his book….)
Don’t worry; it’s been like this for a long time.
(… it has been like this…)
It’s been raining for three hours.
(It has been….)
Are you telling me that it’s my fault?
(… it is my fault?)
The box was hidden in an attic during the war and it’s been there until today.
(… it has been there…)