be good at精通于
be annoyed at对……烦恼
be angry at对(事)……发怒
(take)aim at瞄准
laugh at因……而发笑
stare at盯着看，凝视
at the best充其量
at first开始
at large自由地
at least至少，起码
at length最后，终于
at once立即，马上
at present现在
at rest休息，静止不动
at times间或，有时
He was angry at his brother's remark.
他对他兄弟的批评很恼火。
I don't know him but he has been staring at me for ten minutes.
我不认识他，但是他盯了我足有十分钟。
The foreign countries'attempt at a blockade of the port was unsuccessful.
外国试图对这个港口实施封锁，但没有成功。
I know I am at fault.
我知道我错了。
The escaped prisoner is still at large.
那逃犯仍逍遥法外。
He is at present away on his holidays.
他现在到外地度假去了。
t
careful about小心
particular about对……讲究
careless about粗心
doubtful about对……怀疑
sure about肯定
concerned about担心
a complaint about抱怨，叫屈
bring about导致，引起
care about关心，介意
leave about乱放，乱扔
fuss about大惊小怪
anxious about担心，想念
例如：
How did it come about?
那事是怎样发生的?
She is crazy about pop music.
她对流行音乐着了迷。
English people are always making complaints about their weather.
英国人老是埋怨天气不好。
He is enthusiastic about the music of Brahams.
他热衷于布拉姆斯的.乐曲。
Harry likes eating very much but he isn't very particular about the food he eats.
哈里很爱吃，但对他所吃的食物倒并不讲究。
