As a professional Mandarin instructor with almost two decades worth of teaching experience in American schools, I came to recognize how language-learning in a school setting is only one step in the long journey of acquiring a foreign language. I felt a need and urge to bring my profession beyond school, and I believe professional teaching should be accessible to anyone at any point in their life. It is with this belief that I founded MAD Mandarin LLC in 2018 with the goal to incorporate the latest teaching methods with my own innovative approach of Mindful-Active-Dynamic to positively achieve the best language-learning results.
看看下面的句子：
“今天我去过北大·····食堂的饺子，包子店的老板娘都使我想起去年的日常生活 — 好怀旧！”
这里的“过”应该用“了”。“过”常常用来描述过去的一个经验，而这个经验是用来解释/引出接下来的句子。比如，“我去过北大了，不会再去了。”
“了” 是用来描述一个过去发生或完成的事件，仅此而已。当然“了”和 “过”还有很多别的用法。
再重复一次：“了” 和 “过” 很容易用错，因为它们都是用来描述过去发生事情，可是作用却不一样。现在就看看我刚刚看到的一个错用的句子：
这里的另外一个错用是”好怀旧“。应该是”好怀念“。为什么？我们下次再说！
