1. as as a matter of fact事实上 as a result结果是，所以 as far as远到，就——而言，至于 as far as—— be concerned就——而言 as follows如下 as for至于，说到 as if好像，仿佛 as regards关于，至于 as soon as一——就 as to至于 as well同样，也，还 as well as既——又，除——之外（也） 2. at. At a time每次，一次 at all times无论何时，总是 At any rate无论如何. At best充其量，至多 At one’s best处于最佳状态，在颠峰时刻 At one’s convenience顺便，方便时 At first首先 at firs .sight一看就 A t hand在手边，即将到来 a .large大多数 At last终于 at least至少 At most至多，不超过 At no time决不，从不 At once立即 at random随机的，无目的地 At present现在 a t the cost of以——为代价. At the mercy of在——支配下 at times有时，不时 3. by by accident意外地 by any means无论如何 by all means尽一切办法 by and by渐渐地，不久 by chance意外地，偶然的 by far远远——，——的多 by comparison比较起来 by hand用手，亲手 by means of凭借，用 by reason of由于 by way of通过——方法（形式），经由 by and large大体上，总的来说 by itself单独的，独自的 by no means决不 by the way顺便说说，附带说说 4. for. For example例如 for instance例如 For the present目前，暂时 or the most part多半，在极大程度上 For short简称，缩写 for sure当然，一定，肯定，毫无疑问 For the benefit of为了——的利益 for. He sake of为了 For the time being暂时 for sale代售