You are asking someone in present tense if they object to something you are asking. 你可以用现在时来问别人他们是否反对你问的一些事情。

Here are some examples: 这里有一些例子： 

"Do you mind if I excuse myself?"

 你介意我原谅自己吗？

"Do you mind if we left early?"

 你介意我们早点离开吗？

"Do you mind if I take a nap?"

 你介意我小憩一下吗？

"Do you mind if I ask your mom?"

 你介意我问你母亲吗？

"Do you mind if it snows?"

 你介意下雪吗？

You could also use the word 'would' 你可以用'would'这个词 Here are some examples: 这里有一些例子： 

"Would you mind if we went out to eat?"

 你介意我们出去吃吗？

"Would you mind if I opened the window?"

 你介意我开窗吗？

"Would you mind telling me what you're doing?"

 你介意告诉我你在做什么吗？

"Would you mind being quiet for a minute?"

 你介意安静一会儿吗？