for nothing 的音標(biāo)是[f??r n?θ?z]，基本翻譯為“白費了錢或時間”，速記技巧為：for=非，nothing=尼思特休，整體記憶為：非做了尼思特休的事情，沒有得到任何東西。

英文單詞“for”的詞源可以追溯到古英語“fore”，意為“forward”（向前）。它的變化形式包括過去式“ford”, “for”加上詞綴“-d”構(gòu)成，表示“過去”。

相關(guān)單詞：

1. “fore” - 詞根“for”的變體，可以表示“前面”或“預(yù)先”。在英語中，有很多單詞都含有“fore”，如“forehead”（前額），“foresee”（預(yù)見）等。

2. “forward” - 詞根“for”和詞綴“-ward”的組合，表示“向前”。這個單詞在英語中表示“向前的”，“提前的”，“發(fā)送到前方”等意思。

3. “regard” - 這個詞含有“看作”，“重視”，“尊重”的意思，詞源也是“for”，表示向前看，重視。

以上這些單詞都與英文詞根“for”有著密切的關(guān)系，體現(xiàn)了英語詞匯的豐富性和多樣性。同時，“for”作為英語中一個常用的介詞，在句子中起著重要的作用，引導(dǎo)目的、原因、結(jié)果等。

至于英文詞源、變化形式和相關(guān)單詞的具體數(shù)量，這取決于具體的英文單詞和其使用的語境。一般來說，一個單詞的詞源、變化形式和相關(guān)單詞的數(shù)量會隨著時間的推移而變化。以上內(nèi)容僅供參考。

常用短語：

1. for nothing

2. for the sake of

3. for better or for worse

4. for all that

5. for the time being

6. for the duration of

7. for the duration of one"s life

例句：

1. I worked hard for nothing in return, but I did it for my own satisfaction.

2. I"m willing to travel for the sake of learning new things.

3. They will marry for better or for worse, no matter what happens.

4. For all that, I still believe in love at first sight.

5. For the time being, we"ll have to wait and see what happens next.

6. For the duration of my vacation, I"m going to relax and enjoy myself.

7. For the duration of one"s life, we should try to make the most of every moment.

英文小作文：

標(biāo)題：Life Is a Journey

Life is a journey filled with many unexpected moments. We encounter joy, sorrow, happiness, and sadness, all of which shape our experiences and make us stronger. We work hard for nothing in return, but we do it because we believe in the value of our efforts. We travel for the sake of learning new things and experiencing new cultures. We marry for better or for worse, no matter what happens. We embrace the challenges of life and try our best to overcome them. Life is a journey that we should cherish and make the most of every moment. As we grow older, we should remember to appreciate every moment of our lives and not take anything for granted. After all, life is a journey worth treasuring and living to the fullest.