科技对战争的影响:i wrote a letter telling him about......这里telling him about是什么用法

i wrote a letter telling him about......这里telling him about是什么用法 Last night he wrote a ( ) letter to his friend. He wrote me a letter, ( ) me his trouble. I am writing a letter. 1 ____ the classroom,I found him writing a letter. I rceived a letter from him this morning. How does I write a letter to britney I reicived a letter from my friend yesterday.(同义转换) she wrote to me only a week______ A letter from Jenny