buy and purchase

"purchase" is more formal, that's all. "buy" can also be used to mean "believe something".

I told her that I went to see my parents but she didn't buy that.

Thank you very much. Could you give me some more examples?

Hello,

In most cases I do think they mean the same.

However there are situations where you can use only buy, for example:

"I don't buy that. I think it's the opposite."
"I need to buy some time."

Usually purchase is a more formal way of saying buy. It's commonly used in business instead of buy. Let's see some example

it really implies the same thing..buy is used before the act of buying.. and purchase can be used before or after the act of buying..
totally purchase is more formal
example : i'm going to buy/purchase this shirt .
many employees have the opportunity to purchase shares
in the company they work for .

Ok. Thank you very much.

And welcome to EF, clairvision!

khoshabuy is used before the act of buying.. and purchase can be used before or after the act of buying..

I cannot think of any situation in which this is true.

Please remember to use a capital letter for the first letter of a sentence.