a bit (of) 有一点，一会儿
a few 一些，少量
a great deal 大量，许多
a good/great many 大量，许多
a kind of 一种，一类
a little 一点，少许
a lot of 许多，大量
a number of 一些，许多
a pair of 一双，一副
a piece of 一块(张，根，片)
above all 首先，首要
according to 根据，按照
add up to 合计达……
after all 毕竟，终究
after class 课后
again and again 反复地，再三地
agree to do sth. 同意做某事
agree with sb. 同意某人的看法，与某人看法一致
ahead of 在……之前
all in all 总的来说，总计
all kinds of 各种各样的
all over 到处，遍及，结束
all right 行,好吧，（病）好了
all the best 一切顺利，万事如意
answer for 对……负责
apart from 除去，除了
arrive at (in) a place 到达某地
as a matter of fact 事实上，其实
as a result （作为）结果
as...as 像，如同
as soon as 一……就……
as far as （表示程度，范围）就……；尽……
as if 好像，仿佛
as long as 只要
as though 好像，仿佛
as usual 通常，平常地
as well 也，还有
as well as 除……之外（也）