announce sth. to sb. 向某人宣布……

announce to sb. sth. 向某人宣布……

answer for 为……负责任

anyone who = whoever 任何人(引导主语从句)

apart from 除&hellip ;…外还……

appear to do 好像……

apply for 申请

apply one's minds to 专心于

appreciate doing 感激做……

as a matter of fact 实际上

as a result of 由于……

as if 似乎、好像(引导方式状语从句)

as long as 只要(引导条件状语从句)

as one body 像一个人一样

as soon as 一……就……(引导时间状语从句)

as though 似乎、好像

as well as ①和……一样 ②与……一样好

as well 也;一样

ask (that) sb. (should) do 要求某人应该做某事(虚拟语气)

ask for a leave 请假

ask sb. for advice 取得某人的建议

ask some questions of sb. 向某人提问(书面语)

at a distance 有一些距离、在远处

at a great depth 在很深处

at a loss 不知所措、困惑不解

at a low/high price 价格低(高)

at a low/high speed 速度很慢/快地……

at a mouthful 一口、满口

at a safe speed 以安全速度行驶

at a speed of 以……的速度行驶

at a time 一次;有时、曾经

at first blush 猛一看，乍一看

at full speed 全速前进

at least 至少、最少

at least…if not more 如果不是更多，至少也……

at most 最多、至多

at one time 曾经、以前

at present 现在

at that very moment 就在那个时候

at the ball 在 91exam .org舞会上

at the beginning of 在……的开始

at the bottom of 在……的底部

at the cost of 以……为代价

at the crossing 在十字路口

at the invitation of sb. 应某人邀请

at the latest 最迟、最晚

at the most 最多

at the price of 以……为代价

at the risk of 冒着……的危险

at the same time 同时

at the sight of 看见

at the speed of 以……的速度

at the thought of 当……想到

at the top of the voice 用最高的声音

attempt to do 尝试去做、企图去做

attend to sth. 注意;对……关注

attitude to/towards sth. 对……的态度

attract one's attention 吸引某人注意力

back and forth 来来往往地、(前后)来回地

bark at (狗)向……叫

be (good) value for money ……值钱

be able to do 能够……、有能力……

be about to do when 就要做某事时，突然……

be about to do 准备做……(不接时间状语，表示将来)

be absent from 不在、缺席

be absorbed in 沉迷于& hellip;…、迷恋于……

be active in 在……活跃

be admitted into universities 被大学录取

be afraid of doing 担心某事会发生

be afraid of sth./sb. 害怕某人(物)

be afraid that… 恐怕……

be afraid to do 不敢去做

be after sth./sb. 找……

be along with 和……一起

be an expert on/in/at sth. 在……是专家

be angry at sth. 对某事感到生气

be angry with sb./sth. 对某人(物)感到生气

be anxious about 为……感到焦虑

be anxious for sth. 急切地要……

be anxious to do 急切去做……

be ashamed of 感到羞耻、惭愧

be at breakfast/lunch/supper 在吃早/午/晚饭

be at the same level 在同一水平上

be aware of sth. 知道

be away from 离……远