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一、where定语从句修饰抽象名词point
You reach a point where medicine can’t help. 你已到了药物无法治疗的地步。
The crisis has reached a point where the receiver will have to be called in. 危机已达到非把破产管理人叫来不可的地步。
We have reached a point where a change is needed. 我们到了必须改一改的地步。
有时point也可以是具体的地点：
Let the point where AB cuts CD be called E. 设AB线与CD线的相交点为E。
The accident happened at the point where the A15 joins the M1. 事故发生在A15与M1交叉的十字路口。
二、where定语从句修饰抽象名词case
There are cases where the word “mighty” is used as an adverb. 在一些情况下，mighty一词可用作副词。
Today, we’ll discuss a number of cases where beginners of English fail to use the language properly. 今天，我们将讨论一些英语初学者对英语使用不当的问题。
三、where定语从句修饰抽象名词activity
Those successful deaf dancers think that dancing is an activity where sight matters more than hearing. 那些失聪的成功舞蹈演员们认为，舞蹈是一种让人看胜过让人听的活动。
四、where定语从句修饰抽象名词situation
He got into a situation where it is hard to decide what is right and wrong. 他陷入一种难以分辨是非的局面。
If you risk something important, you cause it to be in a dangerous situation where you might lose it. 你如果拿重要的东西去冒险，那你就是将它置于一种可能会失去它的危险境地。
抽象时间名词定语从句用来修饰表示时间概念的抽象名词。以下是一些例句来说明抽象时间名词定语从句的用法：
The moment (that) I saw her, I knew she was the one.
（我一见到她的那一刻，我知道她就是那个人。）
Do you remember the time (when) we went on that amazing vacation?
（你还记得我们去度过那个美妙假期的时光吗？）
He couldnt forget the day (that) he received the news of his promotion.
（他无法忘记他获得晋升消息的那一天。）
This is the period (when) we usually experience a lot of growth and change.
（这是我们通常会经历许多成长和变化的时期。）
The time (that) we spent together in college was unforgettable.
（我们在大学一起度过的时光是难以忘怀的。）
在这些例句中，抽象时间名词定语从句修饰了表示时间概念的抽象名词，如"moment"（时刻）、"time"（时光）、"day"（天）、"period"（时期）等，进一步为这些名词提供了更多的信息和描述。
1. The moment when the sun sets over the horizon is always breathtaking.
2. I will never forget the day when I graduated from college.
3. The period during which I was studying abroad was the most transformative time of my life.
4. The year in which the Olympic Games were held in my hometown was a moment of great pride for our community.
5. The era in which technology advanced rapidly brought about significant changes in our daily lives.
6. The time at which the clock strikes midnight is traditionally associated with new beginnings and fresh starts.
7. The decade in which I grew up was marked by significant social and cultural changes.
8. The century during which the Industrial Revolution took place revolutionized the way we live and work.
9. The age at which children start school varies from country to country.
10. The period in history when dinosaurs roamed the Earth is a subject of fascination for many scientists and enthusiasts.
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