写情书用英语可以说是 "write a love letter."
来源：这个短语来自英语语言，是指用英语写一封表达爱意的信件。
以下是一些例句：
"I wrote a love letter to my partner expressing my feepngs for them." (我给我的伴侣写了一封情书，表达了我对他们的感情。)
"She took out a piece of paper and a pen, ready to write a love letter to her crush." (她拿出一张纸和一支笔，准备给她的心仪对象写一封情书。)
"He had always wanted to write a love letter to the woman he had loved from afar, but never had the courage to do so." (他一直想给他远远爱着的那个女人写一封情书，但从未有过勇气这么做。)
来源：这个短语来自英语语言，是指用英语写一封表达爱意的信件。
以下是一些例句：
"I wrote a love letter to my partner expressing my feepngs for them." (我给我的伴侣写了一封情书，表达了我对他们的感情。)
"She took out a piece of paper and a pen, ready to write a love letter to her crush." (她拿出一张纸和一支笔，准备给她的心仪对象写一封情书。)
"He had always wanted to write a love letter to the woman he had loved from afar, but never had the courage to do so." (他一直想给他远远爱着的那个女人写一封情书，但从未有过勇气这么做。)