as is often the case是什么意思？

谢谢大家了！急用

这是常有的事。
as／which is often the case (with) ...
此句型意为"…是常有的情形"。这是当<关系代名词>的 as 以全体<主要子句>当先行词的<句型>

事常如是

这是常有的事。 情况常常如此

as is often the case 通常情况下 双语对照 词典结果： as is often the case[英][æz iz ˈɔfən ðə keis][美][æz ɪz ˈɔfən ði kes] 这是常有的事; 以上结果来自金山词霸 例句: 1. as is often the case in china, new terms are being added to contracts sealed at the fair. 在中国通常都是这样，在广交会上达成的合约均需增加一些新条款。

在句首它就是插入语：As is often the case, Mary comes here in her car. Mary开车来这里，这是常常发生的事情. 在句尾，把as换成which,就成了定语从句： Mary comes here in her car, which is often the case.