他是用钢笔写的信。 He wrote the letter with a fountain pen. Traditional 他是用鋼筆寫的信。 Pinyin Tā shì yòng gāngbǐ xiě de xìn. Bopomofo ㄊㄚ ㄕˋ ㄩㄥˋ ㄍㄤ ㄅㄧˇ ㄒㄧㄝˇ ˙ㄉㄜ ㄒㄧㄣˋ。 Where this sentence is used The 是…的 (shì…de) construction in Chinese grammar All Chinese example sentences