精选优质文档-倾情为你奉上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. /计算机使人们彼此间能更方便地交流。2. be about to do sth when 正要做某事突然eg. I was about to go shopping when it suddenly began to rain. /我刚要出去买东西，天就突然下雨了。3. by accident / by chance / accidentally 偶然地4. come across sb 偶然遇见5. act on sth 依行事eg. Each student should act on the rules and regulations of the school. / 每个学生都应该遵守学校的规章制度。6. add to / add up to 加
