alerted

alerted的音标为["ə:ltɪd]，基本翻译为“警觉的；警报的；警报系统”，速记技巧为“a-lert-e-r-t-e-d”。

alerted的英文词源：

1. 词根：alert - 警戒的，警报的

alerted的变化形式：过去式 alerted、过去分词 alerted、现在分词 alerting、第三人称单数 alerts。

相关单词：

1. alert - 警戒的，警报的 - 引申为警报器、警报系统。

2. alarmed - 感到惊恐的，吃惊的 - 引申为使感到惊恐、使吃惊。

3. alarm - 惊恐，惊慌 - 引申为警报、报警器。

例如，在英语中，当一个人被警报器发出警报时，他可能会感到“alarmed”或“alarmed at the news”。同时，“alarm”还可以引申为“alarm clock”（闹钟），闹钟也常常被用来提醒人们时间，从而与“alert”有相似的功能。

在句子中，可以这样使用：The sound of the siren alarmed the whole town.（警报声使整个城镇都感到惊恐。）The alarm clock woke me up at 6 a.m.（闹钟在早上六点把我叫醒了。）

以上就是alerted及其相关单词的英文词源、变化形式和相关单词的解释和举例。

常用短语：

1. alert the authorities

2. be on high alert

3. be alerted to

4. raise an alert

5. be alerted to the danger

6. be on the alert

7. sound the alarm

例句：

1. Police were alerted to a potential threat at the school.

2. We must always be on high alert against potential risks.

3. I was alerted to the danger of falling objects by my childhood experience.

4. The storm raised an alert for coastal communities.

5. The fire sirens were sounded to alert residents to the danger.

6. The news media quickly alerted the public to the new disease outbreak.

7. The teacher sounded the alarm on the students" lack of attention in class.

英文小作文：

标题：Alertness in Life

Life is full of unexpected dangers and risks, and it is important to be constantly alert to them. Whether it is a potential health hazard, a dangerous situation at work, or a criminal activity in our community, being alert can help us avoid trouble and take appropriate action when necessary.

We should always be on the lookout for potential problems and be ready to respond quickly when they arise. This requires us to maintain a high level of awareness and be attentive to our surroundings at all times. It also means being willing to take action when necessary, even if it means stepping out of our comfort zone or putting ourselves at risk.

However, being alert does not only mean being aware of potential dangers and risks. It also means being aware of opportunities and possibilities that may arise in our lives. By being alert, we can seize opportunities that others may miss and take advantage of them to further our goals and ambitions.

In conclusion, being alert is essential for success and safety in life. It requires us to be attentive, aware, and ready to act quickly when necessary. By cultivating this habit, we can avoid trouble, seize opportunities, and live a more fulfilling life.