英语语法一点点.Promise to do sth.承诺做某事I promised to write to my fri

英语语法一点点.Promise to do sth.承诺做某事I promised to write to my fri 承诺某人作某事怎么说 promise sb to do 还是do I didn‘t promise to do 和I promised not to do 有什么不一样 promise to do sth,permit doing sth? promise doing sth还是to do sth promise sb.to do sth.中to do sth 为什么做OC而不做DO? 中译英：我承诺不污染环境（用上promise not to do sth.) 有promise sb to do sth吗 want sb.to do sth 是想要某人做某事 造句 decide to do sth决定做某事 try to do sth有木有努力做某事的意思 想做某事.want to do sth.的同意句.