by myself的音標是["ba? m?lselv]，基本翻譯是“獨自地；自己”，速記技巧是：by+反身代詞=自己做某事。

By myself的英文詞源是by（通過）+oneself（自己）。這個詞的含義是“獨自地，單獨地”。

By myself的變化形式有：單數形式by oneself，復數形式by ourselves。

相關單詞有：

1. solitude（獨處，孤獨）：這個詞由solus（獨自）+itude（狀態）構成，表示獨自一人的狀態。

2. isolation（孤立）：這個詞由iso（等同）+lay（放置）+sion（狀態）構成，表示獨自放置的狀態，即孤立。

3. lone（孤獨的）：這個詞由lo(n)e（孤獨的）+nous構成，直接表示孤獨的狀態。

4. alone（單獨的）：這個詞由al(l)one（單獨的）構成，表示獨自一人。

5. self-reliance（自立）：這個詞由self（自己）+reliance（依賴）構成，表示獨自依賴自己實現目標的能力。

以上單詞都與by myself的含義和用法密切相關，體現了獨立、獨自的特點。每個單詞都有其獨特的含義和用法，體現了英語語言的豐富性和多樣性。同時，這些單詞也反映了人類對于獨自行動和獨立精神的追求和贊美。

常用短語：

1. by oneself

2. on one"s own

3. independently

4. self-reliantly

5. self-sufficiently

6. alone

7. without help

例句：

1. I can do it by myself. 我可以自己完成它。

2. She cooked dinner on her own. 她獨自做了晚餐。

3. He independently solved the problem. 他獨立解決了問題。

4. She self-reliantly got herself to the hospital. 她自信地獨自去了醫院。

5. She is self-sufficiently independent. 她非常獨立。

6. I can"t do it alone, I need help. 我一個人做不到，我需要幫助。

7. He always goes to school alone in the morning. 每天早上他總是獨自去上學。

英文小作文：

I like to spend my free time by myself, reading books, writing in my journal, and doing yoga. I find that this time alone is very valuable to me, as it helps me recharge my batteries and clear my mind. I also find that it helps me to be more independent and self-reliant, which is important in life. I like to take this time to reflect on my life, my goals, and what I want to achieve in the future. I find that this helps me to be more focused and determined in my daily life, whether it"s working, studying, or just going about my daily routines. I think it"s important to take time for yourself, whether it"s with friends or on your own, as it helps you to appreciate what you have and to be the best version of yourself.