keep on doing sth 继续作某事 ; 继续做某事 ; 持续做某事 ; 不停地做

keep sb doing sth 使某人一直做某事 ; 让某人不停地做某事 ; 使某人持续做某事 ; 让某人做某事

keep sb from doing sth 阻止某人去做某事 ; 使某人不做某事

keep sbfrom doing sth 阻止某人做某事

keep slx busy doing sth 使某人忙于做某事

I keep on doing sth 我一直在做某事

Keep sth from doing 阻止 ; 阻止……做某事

keep someone doing sth 让某人一直做某事

keep sth or doing sth 继续保持