Professor Smith was the only one in the university ______ to the international medical conference.A.being invited B.having been invitedC.to have been invited请分析各选项.
问题描述：
Professor Smith was the only one in the university ______ to the international medical conference.
A.being invited
B.having been invited
C.to have been invited
请分析各选项.
答
A选项现在分词的被动式，强调正在进行。
B选项一般用作状语，不用做定语。用做状语时强调动作的先后顺序，即having done的动作发生在句子的动作之前。
C选项不定式做后置定语，用了完成式，强调是过去发生的事情。
答
不定式做后置定语
答
C.to have been invited
属于飞谓语做定语的题型
动词不定式作定语：常放在所修饰的名词之后,多用来修饰have、there be、with之后的名词；或修饰“the+序数词、only”.
不定式的完成时强调动作发生在主句动作之前
AB是分词.分词做定语前置
如a pullzing question 、 a pullzed man