1、enable sb to do sth 使某人能做某事

　　eg：The computer enables people to communicate with each other more conveniently.计算机使大家彼此间能更便捷地交流。

　　2、be about to do sth when 正要做某事忽然

　　eg：I was about to go shopping when it suddenly began to rain.我刚要出去购物，天就忽然下雨了。

　　3、by accident/by chance/accidentally 偶然地

　　4、come across sb 偶然遇到

　　5、act on sth 依行事

　　eg：Each student should act on the rules and regulations of the school.每一个学生都要遵守学校的规章规范。

　　6、add to/add up to 加上/总计达

　　eg：The number of the patients added up to three hundred last week.上星期，患者人数达到了三百人。

　　7、in advance/ahead of time 提前

　　8、after all 毕竟

　　9、agree to do sth/agree with sb 赞同做某事/赞同某人