Question

when did you buy it?​

Answer 1

Answer:

Your first sentence uses the simple past (Did you buy ...?) and your second sentence uses the present perfect (Have you bought ...?). Sometimes there is a difference in meaning between these two forms, but in your example there is not.  

In the sentence pairs below, there is a difference in meaning. The sentences in the simple past describe something that is over, while the sentences in the present perfect, have/had + the past participle, describe an action or situation that still continues in the present.  

 

Simple past:      I ate a lot of cake. (I’m finished eating cake.)

Present perfect: I’ve eaten a lot of cake. (I may eat more cake.)

 

Simple past:      I lived in London for three years. (I don’t live in London anymore.)

Present perfect: I have lived in London for three years. (I still live in London.)

 

Simple past:      Why didn’t you send me any messages? (The time for sending messages is over.)

Present perfect: Why haven’t you sent me any messages? (You can still send me a message.)

Explanation: