stop from doing sth Ⅰ.stop doing sth.“停止做某事”表停止正在做的事情。如: ① They stoped talking to me. 他们中断了与我交谈。 ② Stop running about. 不要乱跑。 Ⅱ.stop to do sth. “停下来去做某事”即停止正在做的事,而去做另一件事。不定式为stop的目的状语。如: ③ They stopped to talk to me. 他们停下来和我交谈。 ④ Let’s stop to have a rest 让我们停下来休息一会儿。 Ⅲ.stop (sb/sth).from doing sth. “阻止某人/物不要做某事”from可省略。=prevent sb. from doing sth; keep sb. from doing sth. 但keep~ 中的from不能省略。如: ⑤ We must stop him (from) doing such a fool