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. /計(jì)算機(jī)使人們彼此間能更方便地交流。

　　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. /我剛要出去買東西，天就突然下雨了。

　　3. by accident / by chance / accidentally 偶然地

　　4. come across sb 偶然遇見

　　5. act on sth 依……行事

　　eg. Each student should act on the rules and regulations of the school. / 每個學(xué)生都應(yīng)該遵守學(xué)校的規(guī)章制度。

　　6. add to / add up to 加上/ 總計(jì)達(dá)

　　eg. The number of the patients added up to three hundred last week. / 上星期，病人人數(shù)達(dá)到了三百人。

　　7. in advance / ahead of time 提前

　　8. after all 畢竟

　　9. agree to do sth / agree with sb