作业帮一道牵涉到时态的英语竞赛题.求助大神解释~~It was only after some progress ____ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.A.was made
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一道牵涉到时态的英语竞赛题.求助大神解释~~It was only after some progress ____ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.A.was made
一道牵涉到时态的英语竞赛题.求助大神解释~~
It was only after some progress ____ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.
A.was made B.would have been made
C.has been made D.had been made
一道牵涉到时态的英语竞赛题.求助大神解释~~It was only after some progress ____ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.A.was made
D It was...that.为典型强调句
即Men began to realize.only after some progress_____in the use...
意为只有在电流的使用和发展取得进步后,人们才开始了解到电磁的重要性和可能性.
had done为过去完成时,表示在began（一般过去式）的动作之前.
选择D选项
整个句子是个典型的强调句，所以在分析句子时候可以首先去掉It was...that....
所以句子简化成为了：
men began to realize the.......only after some progress_____
意思是只有在电流已经取得进步化的发展后，人们才了解到电磁的重要
用HAD DONE的形成表示在began的动作发...
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选择D选项
整个句子是个典型的强调句，所以在分析句子时候可以首先去掉It was...that....
所以句子简化成为了：
men began to realize the.......only after some progress_____
意思是只有在电流已经取得进步化的发展后，人们才了解到电磁的重要
用HAD DONE的形成表示在began的动作发生之前的行为
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c
D It was...that....为典型强调句
即Men began to realize.......only after some progress_____in the use...
意为只有在电流的使用和发展取得进步后，人们才开始了解到电磁的重要性和可能性。
had done为过去完成时，表示在began（一般过去式）的动作之前。
D
看后半句中that men began to realize ..began是过去式，先要有进步人们才会意识到他们的重要性所以电流在使用和发展方面有进步是在人们意识到之前，过去的过去用过去完成时。你懂了吗？