11. It's the custom to... at ..．在……做……是一种习俗。
对话示例
— You know the customs of many countries, don't you?
— Yes, I've been to many places before. And I have a general understanding of their customs before I go.
— Can you tell me some? Like the place we live in.
— Certainly. It's the custom to eat all the food on your plate at table.
— 你知道很多国家的习俗，不是吗？
— 是的，我以前去过很多地方。在去之前我对它们的风俗习惯都有个大致的了解。
— 你能告诉我一些吗？比如我们生活的这个地方。
— 当然。用餐时吃光你盘子里的食物就是这里的一种习俗。
句型分析
It's the custom to... at ..．这个句型中的to是作不定式使用，后面接动词原形，指的是做什么事情是一种习俗。
句子示例
• It's the custom to decorate a Christmas tree at Christmas．在圣诞节装扮圣诞树是一种习俗。
• It's the custom to make lanterns with pumpkins at Halloween．在万圣节前夕用南瓜制作灯笼是一种习俗。
• It's the custom to dress up as Santa Claus to give children gifts at Christmas．在圣诞节装扮成圣诞老人给小孩送礼物是一种习俗。
重点单词
decorate [ˈdekəreɪt] v．装饰
lantern [ˈlæntən] n．灯笼