同学你好，该知识点来自沪江网校《新概念英语1、2、3、4册连读标准会话【随到随学班】》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~
be thought to do 被认为做了……
Gray is thought to be in hiding near the France/ Italy border.
他们认为格雷藏在法国和意大利边境附近。
The storm is thought to be responsible for as many as four deaths.
据认为，暴风雨造成4人死亡。

be thought to have done，被认为是已经做了……，have done体现动作已经完成了
It is thought to have been made in Alexandria, Egypt.
它被认为是在埃及亚历山大时期制成的。

was thought to have been killed，这里强调人们认为他已经被杀死了

祝同学学习进步~