never mind的用法
1.when you don't want to bother with something you don't want to do
勸某人，別因為某人或者某件事情而煩惱時
"Never mind him, he is just a jerk."
別因為他而煩惱，他是個混蛋。

2.when you changed your mind about doing something
當你改變自己的想法時
"Never mind. I don't want to go out anymore."
沒事，算了算了，我也不想出去了。
"I changed my mind. I don't want to go out anymore."
我改變主意了，不想出去了。

3.can be used to tell someone not to worry
當你要告訴別人，不用擔心時
"Never mind about what I just said. It is irrelevant."
我剛剛說的那些，不是很重要，別擔心。

4.Never mind！
不用謝/沒關系！

拓展一下
1.Drop it! 別提了！
"Hey, how much are they paying you?"
嗨，他們付給你多少錢？
"I already told you to drop it!"
我告訴你別提了！

2.Ignore it! 忽視它吧！
You should ignore it. It is just spam email!
你應該忽略它，這只是個垃圾郵件！