fall to doing的音標為[f??l tu d??ɡ??]，基本翻譯為“逐漸開始做某事”，速記技巧為“fall 倒退+to 掉落+doing 正在做某事”。

fall to doing的詞源是拉丁語fallere，意為“欺騙，欺騙行為”。其變化形式主要有fallen，falling，fallen from。相關單詞有：

1. decline：這個詞源于拉丁語decere，意為“去，走”，在fall to doing中表示“下降，衰退”。

2. drop：這個詞源于古英語droppa，意為“掉下”，與fall to doing中的“掉落”含義相近。

3. fail：這個詞源于中古英語，意為“失敗”，與fall to doing中的“失敗”含義相似。

4. fall into：這個詞源于拉丁語infertere，意為“插入，落入”，與fall to doing中的“掉入”含義相近。

5. fall off：這個詞源于古英語falla，意為“落下”，與fall to doing中的“掉落”含義相似，但更強調數量或程度的減少。

6. fall prey to：這個詞源于拉丁語prehendere，意為“抓住”，表示“成為……的受害者”。

7. fall short of：這個詞源于拉丁語shortus，意為“短缺的”，表示“達不到預期的標準或要求”。

8. fall back on：這個詞源于古英語falla，意為“后退”，表示“依靠，依賴”。

9. fall out of favor with：這個詞源于拉丁語favoratus，意為“被寵愛的”，表示“失去寵愛”。

10. fall into disuse：這個詞源于拉丁語disusum，意為“被廢棄的”，表示“不再被使用”。

以上就是關于fall to doing的英文詞源、變化形式以及相關單詞的解釋和舉例。這些單詞在英語中具有豐富的含義和用法，可以幫助我們更好地理解和使用這個短語。

常用短語：

1. fall to doing sth. 開始做某事

例句：After a long break, he finally fell to writing his novel again.

2. fall into doing sth. 陷入做某事

例句：He fell into a deep depression after his divorce.

3. give up doing sth. 放棄做某事

例句：She gave up smoking after years of struggle.

4. start doing sth. 開始做某事

例句：After years of hard work, she finally started her own business.

5. keep on doing sth. 繼續做某事

例句：After a long day of work, she keeps on doing some housework.

6. keep doing sth. 一直做某事

例句：He kept working on his project even when he was feeling tired.

7. interrupt sb. doing sth. 中斷某人做某事

例句：The phone rang interrupting him in the middle of his speech.

英文小作文：

I enjoy spending my free time doing various activities, but my favorite thing to do is to fall into reading books. Reading is a relaxing and enjoyable way to spend time, and it can also provide valuable knowledge and inspiration for my future. I often fall into reading books when I am feeling stressed or bored, and it helps me to forget about everything else and immerse myself in the story. I also enjoy sharing my experiences with friends and discussing books with them, which can be a great way to connect with others and learn from their perspectives. So, even though I am busy with my daily life, I always make time for reading books because it is such a rewarding and enjoyable activity to do.