This is Everyday Grammar. I'm Lucija.
欢迎收看《每日语法》栏目，我是露西佳。
And I'm Kaveh. Lucija, if you can change one thing about your past, what would you change?
我是卡维。露西佳，如果你能改变过去的一件事情，你希望改变什么？
That's an interesting question.
这个问题很有意思，
I don't have many regrets, but if I had to change one thing, I think I would continue with martial arts classes.
我没有太多遗憾，但如果可以改变一件事情的话，我想我会继续学习武术。
Wow, that's really cool. How about you?
哇哦，那太酷了！你呢？
Well, if I had known the importance of learning a foreign language, I would have studied one.
我嘛，如果我知道学习一门外语的重要性，我就会选学一门外语。
You know what this conversation reminds me of? Past unreal conditionals.
你知道我们这次对话提醒了我什么吗？过去虚拟条件句。
Like other conditionals, the past unreal conditional has an "IF" clause and a "RESULT" clause.
和其他的条件句一样，过去虚拟条件句有if从句和结果从句；
Past unreal conditionals are rather complex. Use the past perfect in the "IF" clause.
过去虚拟条件句相当复杂。在if从句中使用过去完成时态。

In the "RESULT" clause, use "would" followed by the present perfect.
结果从句中，使用would+过去完成时态，
Here is an easy formula to remember: If I had known A, I would have done B.
记住下面这个简单的公式：如果我早知道A，我就去做B了。
The past unreal conditional is really helpful to describe how you would have acted differently if you had had more information.
在描述以下情形时，使用过去虚拟条件句很有帮助：如果你得到更多信息，你的做法就会不同。
Past unreal conditionals often express regret about something that happened in the past.
过去虚拟条件句通常用来表达对过去发生的事情的遗憾，
Like the fact that I didn't continue with martial arts when I was younger.
就像年少时，我没有继续学习武术一样，是既成事实。
Or that I didn't learn a foreign language when I was younger.
抑或是年少时，我没有学习外语。
But Kaveh, I don't think we should feel bad, because now we're about to talk about grammar with you.
但是，Kaveh，我觉得我们没必要觉得这很糟糕，因为我们现在正跟你们探讨语法呢。
And that's Everyday Grammar.
以上就是今天节目的全部内容。