0(BUY) : when we talk about small things that we take from shop then it is used (buy).
Jab aap koi choti cheez ko kharidte hain to uske liye (buy) ka use karen.
Example: i have to buy a book/copy/pen/pencil/dictionary etc.
These all are not so costly. That is why we use buy to take anythings ok.
(PURCHASE) : when we talk about to take anythings so costly and big things. We use (purchase).
Example: i have to purchase a car/a flat/a house/a motorbike etc.
I hope you all understood.
Thank you....
