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,helefthisseatsoquietlythatnoonecomplainedthathisleavingdisturbedthespeaker．A．beganB．beginningC．havingbegunD．b

Question

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

Answer 1

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,