英语语法（要过程）— Is Bob still performing —I am afraid not .He is said _______ the stage already as he has become an official.A.to have left B.to leaveC.to have been left D.to be left
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英语语法（要过程）— Is Bob still performing —I am afraid not .He is said _______ the stage already as he has become an official.A.to have left B.to leaveC.to have been left D.to be left
英语语法（要过程）
— Is Bob still performing
—I am afraid not .He is said _______ the stage already as he has become an official.
A.to have left B.to leave
C.to have been left D.to be left
英语语法（要过程）— Is Bob still performing —I am afraid not .He is said _______ the stage already as he has become an official.A.to have left B.to leaveC.to have been left D.to be left
这是be said to do 的句型用法.
to do 有很多形式,比如to be done被动,to be doing正在,to have done已经.
据说他已经离开舞台了,因为他已经成为一个官员了.
表示据说之前就已经做完的事,就用to have done 的形式.
这里是非谓语的用法,表示在句中的谓语动词之前已经发生的动作时用的.
A。already在那儿，加上后面has become，所以一定用完成时态，排除BD；然后是主动语态，所以选A。
A
用to have done 表示已经完成某个动作了，to do表示现在还未做，未来将会做某个动作。
have been done 表示被动。
从句子的意思来说，他离开舞台已经是做完了而且是主动的动作，所以答案很明显了。
A
选择A 因为在sb is said 结构中后面需要接不定时的适当形式，即sb is said to do/to have done以及被动形式。这里的as he has become an official暗示他已经是公务员了，所以肯定已经离开了舞台，所以应该选不定式的完成式to have done 所以选择A
答案是A. to have left
这是动词不定式 的完成形式 作主语补足语
动词不定式 用完成形式 表示动作发生在 谓语动词之前
也就是 说话是 该动作已经发生
句子意思 据说他已经离开舞台了