副词短语：

as is known to all；

as usual/at a time；

at all costs；

once upon a time；

one after another

在句中的功能相当于副词，通常在句中作定语、表语或者状语。

相关介绍

as is known to all众所周知

用法：as is known to all通常放在句首，表示后面所陈述的是大家都知道的事情，类似的短语还有as we know,we all know that。

例句：As is known to all, the wholesale buyers in our company are very responsible.

众所周知，我们公司的批发采购员很尽责。

结构分析：As is known to all是状语从句, the whole sale buyers in our company是主语（in our company是介词词组，作后置定语）， are是系动词， very responsible是形容词词组，作表语（副词+形容词）。

as usual像平常一样

用法：as usual在句中作状语，修饰谓语动词，其位置比较灵活，可置于句首、句中或者句末。类似的词组还有as always。

例句：Though it rained, John left home for work at 7:00 as usual. 尽管下雨了，约翰还是跟平常一样，7点出门上班。

语法点：例句中的though是连词，引导让步状语从句，though一般不与but同时出现在一个句子中

as you see如你所见

用法：as you see一般置于句首，是独立的成分，用逗号跟后面的句子分开。类似的词组还有as you can see。

例句：As you see, Jenny is a girl with a sunny disposition.

如你所见，珍妮性格很开朗。

at a distance在远处

用法：at a distance一般置于句尾，作地点状语，类似的词还有in the distance。

例句：He told us the painting should be appreciated at a distance.

他告诉我们，欣赏这幅画时，一定要跟它保持一定的距离。

at all costs不惜一切代价用法：at all costs相当于at any cost, 在句中作状语。 例句：The police state openly that they will save the boy at all costs.警方声明将会不惜一切代价救回那个男孩。

at all times随时，永远用法：at all times在句中作时间状语，相当于for ever, all the time。 例句：They are going to seek advice from the expert at all times.他们随时准备咨询专家。

at any moment随时用法：at any moment一般位于句尾，作时间状语。类似的词组还有at any minute, at any time。 例句：You can come and fetch your lost purse at any moment.你随时准备咨询专家。

once upon a time从前

用法： on upon a time在句中作时间状语，通常用于童话的开头。同义短语有long (long) ago。

例句：once upon a time, there is a monster on the most western island of the earth.

从前，地球最西方的岛上住着一个怪兽。