同学你好，该知识点来自沪江网校《大学英语四级全程备考班【小橙卡专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
as of既可以表示从……开始，也可以表示截至……，具体要根据语境推测和时态等推测，第一句应该表示“截止”的意思。比如
As of Monday, an interim governor will take over duties until an emergency election is held. 从星期一开始，临时州长将接管职责，直到举行紧急选举。
As of 9 AM, we've learned that as many as five companies are involved in the insider trading scandal. 截至上午9点，我们已经了解到多达5家公司卷入了内幕交易丑闻。

祝同学学习进步~

PS：这里有一份老学员专属“薅羊毛”攻略，查收请戳>> https://hj.vc/TS0X <<