有些有动词+宾语+不定式的结构,不定式的动词往往是be,不定式一般可以省去。例如:
consider find believe think declare(声称) appoint
guess fancy(设想) judge imagine know
例如:
We believe him to be guilty.
我们相信他是有罪的。
We know him to be a fool.
我们知道他是个笨蛋。(to be 不能省去)
典型例题
Charles Babbage is generally considered ___ the first computer.
A. to invent
B. inventing
C. to have invented
D. having invented
答案:C. 一般没有consider+宾语+be以外不定式的结构,也没有consider+宾语+doing的结构,排除A、B、D。consider用动词be以外的不定式作宾补时,一般要求用不定式的完成式,故选C。