a few (表示肯定)有些，几个
a good deal (接不可数名词)许多，大量
a little (表示肯定)一些，一点点
a lot of 大量的，许多
a number of 若干，许多
a series of 一系列，一连串
according to 根据
account for 说明(原因等)
after all 毕竟，终究
ahead of 在……前面，先于
all but 几乎，差一点;除了……都
all of a sudden 忽然
all over 到处，遍及;全部结束
all right 令人满意的;(健康)良好的;好，行，可以
all the same 仍然，照样地
all the time 一直，始终
allow for 考虑到，顾及
and so on 等等
anything but 根本不
apart from 除……之外(别无);除……之外(尚有)
as……as… 像，如同，与……一样
as a matter of fact 事实上，其实
as a rule 通常，照例
as far as 远到;就……而言，至于
as follows 如下
as for/to 至于，关于
as/if though 好像，仿佛
as long as 只要，如果;既然，由于
as soon as 一……就，刚……便
as usual 照例，像平常一样
as well 也，又
as well as 除……之外(也)，既……又
aside from 除……以外(尚有)
ask for 请求，要求
