fail to do的音標是[fe?l tu d?]，基本翻譯是“未能做…”，速記技巧是“fail”詞根，to do不定式。

fail to do的英文詞源為：

fail：不及物動詞，意思是“失敗，不及格，未能做某事”。

to do：不定式動詞，表示“做某事”。

fail to do的詞源可以追溯到古英語時期，表示“未能完成某事”的意思。

相關單詞：

1. failure：名詞，意思是“失敗，失敗者”。其詞源與fail to do相似，也來自古英語時期，表示“未能完成某事”的意思。

2. fail in：動詞短語，意思是“在…方面失敗”。其詞源與fail to do相似，也來自古英語時期。

3. unsuccessful：形容詞，意思是“不成功的”。其詞源與fail to do相似，表示“未能成功”的意思。

fail to do的詞形變化形式為fail to + 動詞原形，表示“未能做某事”。在英語中，與fail to do相關的單詞還有許多，如success、attempt、promise等。這些單詞都與未能成功完成某事有關，但在不同的語境下有不同的含義和用法。

總之，fail to do是一個常用的英語短語，其詞源可以追溯到古英語時期。它涉及到的相關單詞具有不同的含義和用法，但都與未能成功完成某事有關。這些單詞在英語中具有廣泛的應用和影響。

常用短語：

1. fail to complete

2. fail to achieve

3. fail to meet

4. fail to succeed

5. fail to finish

6. fail to arrive on time

7. fail to respond

例句：

1. I failed to complete the assignment on time.

2. We failed to achieve our goal of winning the competition.

3. The company failed to meet its financial targets for the year.

4. He failed to succeed in his attempt to climb the mountain.

5. I failed to finish my work before the deadline.

6. The plane failed to arrive on time due to bad weather.

7. The email failed to respond to my inquiry within a reasonable time frame.

英文小作文：

Failure is a common experience in life, and it can sometimes be a valuable lesson. Although failure can be frustrating, it can also motivate us to try harder and learn from our mistakes.

When we fail, we may feel disappointed and lost, but it"s important to remember that failure is not the end of the world. Instead, we can use failure as an opportunity to learn and grow. We can learn from our mistakes and try again with a new perspective and determination.

In addition, failure can also teach us valuable life lessons, such as perseverance, resilience, and self-confidence. These lessons can help us become stronger and more resilient individuals who are able to handle setbacks and challenges with ease.

Finally, failure can also be a catalyst for success in the future. By learning from our failures, we can develop a better understanding of what works and what doesn"t, and this can lead to greater success in the future. Therefore, even if we fail at something now, there"s always a chance for success in the future if we keep trying and learning from our mistakes.