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作为一个以英语为母语的人，你可能会意识到in,on与at之间存在差异。而大多数学生则掷骰子决定该用哪一个。好吧，收起你的骰子，让我们来学习这三个单词之间的区别。
我认为想一想这些介词的定义是很有帮助的。只是作为一个提示，介词是用来辨别句中位置关系的语体。因此，如果你在谈论一个对象或一个人，并且你想包括一个地方，那么介词可以帮助你来表述。
IN在...里面So first, let us look at the word in. This word means surrounded by or encircled by. If you want to say something is encased or surrounded by anything, this is your go to preposition.首先，让我们看看in这个单词。这个词的意思是被包围或被围绕。如果你想说某物被什么东西包围或围绕，这就是你要找的介词。Right now, I am in my room.现在，我在房间里。There are four walls, a ceiling and a floor. I am surrounded by the room.这儿有四堵墙，一个天花板和一个地板。我被整个房间包围。This also works for cities and countries. Go ahead look outside. What country are you surrounded by? Then you are in this country!这也适用于城市和国家。往前看外面。你周围是哪个国家？那么你就在这个国家！I am in the United States of America. I am in New York City.我在美利坚合众国。我在纽约。What about water? Yes, that too.水呢？是的，也一样。She is in the pool. She is in the ocean. He is in the lake or pond or bathtub.她在游泳池里。她在海里。他在湖里、池塘或浴缸里。Again, if you are surrounded by the location, then you are in that location.同样，如果你被某一地点所包围，那么你就处在那个位置上。If you say that you are in a door (I hope that you are not), then as a fluent English speaker, I understand that you have broken the door and you are somehow trapped in the door.如果你说你在一个门里（我希望你没这么说过），然后作为一个流利的说英语的人，我知道你打破了门，你不知怎么被困在门上。Here are some more examples:下面是一些例子：
游客
