这道题选c,请问这是什么结构?这是什么语法?为什么选c?请讲详细一些.2.Thelecture_________,he left his seat so quietly that no one complainedthat his leaving disturbed the speaker. A.beganB.beginningC.havingbegun D.b

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这道题选c,请问这是什么结构?这是什么语法?为什么选c?请讲详细一些.2.Thelecture_________,he left his seat so quietly that no one complainedthat his leaving disturbed the speaker. A.beganB.beginningC.havingbegun D.b
这道题选c,请问这是什么结构?这是什么语法?为什么选c?请讲详细一些.
2.The
lecture_________,he left his seat so quietly that no one complained
that his leaving disturbed the speaker.
A.began
B.beginning
C.having
begun D.being beginning

这道题选c,请问这是什么结构?这是什么语法?为什么选c?请讲详细一些.2.Thelecture_________,he left his seat so quietly that no one complainedthat his leaving disturbed the speaker. A.beganB.beginningC.havingbegun D.b
回答:这是独立主格结构.如果补充完整,句子将是这样:
After/ When the lecture began/had begun,he left his seat so quietly that no one complained that his leaving disturbed the speaker.
提问中的句子就是把这个复合句改成了简单句,由于主句和从句的主语不一致,除了要把从句中的谓语动词改成非谓语动词外,还要保留其主语,这就叫“独立主格”.又如:
如果时间允许,我要去买点东西.
If time permits,I’ll go and do some shopping.(复合句)
Time permitting,I’ll go and do some shopping.(简单句)
欢迎提问,

the lecture是独立主格,前面那截表示后面事情发生时的状态,根据句意,应该说会议正在进行