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加上/总计达eg.The number of the patients added up to three hundred last week./上星期，病人人数达到了三百人。

　　7.in advance/ahead of time提前

　　8.after all毕竟

　　9.agree to do sth/agree with sb/agree to sth

　　10.aim at doing sth下定目标做某事eg.Aiming at winning the game， he practiced hard every day./为赢得比赛，他每天努力练习。

　　11.allow/permit/forbid doing sth允许/允许/禁止做某事

　　12.allow/permit/forbid sb to do sth允许/允许/禁止某人做某事

　　13.apologize to sb for sth因某事向某人道歉

　　14.take sth in one's arms抱着……

　　15.arrive at a conclusion得出结论

　　16.put sb to shame使某人相形见绌eg.His courage put all the other students to shame./他的勇气令其他学生都感到惭愧不如。

　　17.be astonish at sth因某事感到震惊

　　18.make the bed铺床

　　19.blame sb for sth/it is me to blame因某事责怪某人/该受责怪的人是我

　　20.break down/break up/break out/break into坏了/驱散/爆发/破门而入

　　21.hold one's breath/out of breath摒住呼吸/上气不接下气

　　22.bring about/bring up引起，使发生/抚养长大

　　23.burst into tears/laughters突然大哭/大笑

　　24.burst out crying/laughing突然大哭/大笑

　　25.call at sp/call on sb/call up/call off/call out to/call for/call on sb to do拜访某地/拜访某人/打电话/取消/大喊/叫来/号召某人做某事