英语选择题Shiisknownontheenvironmentalproblemformanyyears.A.tobeworkingB.toworkC.tohavebeenworkingD.forhavingworked这里的beknownto是不是一个搭配啊,这句话是什么意思啊

Question

英语选择题
Shi is known___ on the environmental problem for many years.
A.to be working
B.to work
C.to have been working
D.for having worked
这里的be known to是不是一个搭配啊,这句话是什么意思啊

Answer 1

答案是C.是的,be known to do是一个固定搭配.在这个结构中,动词不定式作状语,表示主语在某一方面存在的情况.这个句型往往可以转换成下面的句型：
It is known that .
这个结构中常用的动词有：say,believe,think等.
又如：It is said that he is studting abroad.___He is said to be studying abroad.