常见“介词+名词/代词”短语
as a matter of fact 其实，事实
as a result结果，因此
as a rule通常
at a time 每次，一次
at all events 无论如何
at any rate无论如何，至少
at first sight 乍一看，初看起来
at first起初
at hand 在手边，在附近
at heart 在内心；实质上
at home 在家，在国内
at last终于
at least至少
at length最后，详细地
at no time 从不，决不
at once立刻
at one time 同时，曾经，从前曾
at present 目前，现在
at the moment 现在，此刻
by accidence/chance偶然
by all means 无论如何，必定
by hand 用手
by heart 牢记，凭记忆
by means of 借助于，用
by mistake 错误地
by no means 决不
by oneself 独自地
by reason of 由于
by the way顺便说
for (the) purpose of 为了
for a moment 片刻，一会儿
for a while一会儿
for example例如
for instance 例如，举例说
for one thing 首先，一则
for oneself为了自己
for the moment 现在，暂时
for the present目前，暂时
in (the) future 今后，将来
in a hurry 匆忙地，立即
in a moment 立刻，马上
in a sense从某种意义上说
in addition 另外
in any event无论如何