as开头的英文

asafetida n. [植物]阿魏ascarid n.[动物] 蛔虫ascend vt.攀登，爬上ascendance n.优势，权势ascertain v。确定，探查ascetic n.禁欲者，苦行修道者ascot n.宽领带ascribe vt.归因于，归咎于...太多了，翻字典吧~~呵呵

As we all knowAs everyone konwsIt's well known thatwhat's know to us that~~~~~~~~~~~~~~~~希望对你有所帮助，望采纳~~~~~~~~~~~~~~~~~~

as everyone knows,as we all know,as is well-known,it is well known that...

as有转折的意思表虽然 但不是在开头 因为as引导的让步从句必须是倒装的形式，倒装的形式是：1）提前表语（单数可数名词做表语时要省略冠词）2）提前状语3）提前动词原形。例如：Child as he was, he knew what was the right thing to do. 尽管他是个孩子，他却知道什么是该做的事情。Try as he might, he failed in the exam. 尽管他努力了，可还是考试没及格。Much as I like it, I can’t afford the laptop. 虽然我非常喜欢这部笔记本电脑，我却买不起。给你的网址链接上更全面的说明了as的用法 希望能够对你有帮助

1. 用as引导非限制性定语从句的：As we all know；As everyone/everybody knows；As is known to us all；As is known to everyone/everybody2. 用It做形式主语，that从句做真正主语的：It is known to us all that从句；It is known to everyone/everybody that从句3. 用what引导主语从句的，后用that引导表语从句的：What is known to us all is that从句；What is known to everyone/everybody is that从句