解析:选B。be due to do“预定要做”。句意“下一趟火车预定四点到达伦敦。”
1【教材原句】 He claims to have seen a round black creature moving quickly through the water.(P52)
他声称看见一个黑黑的、圆圆的动物在水中快速游动。
【句法分析】 本句中的to have seen是动词不定式的完成形式,表示动作发生在句子谓语动词claim之前。
不定式的时态有三种:
(1)不定式的一般式:to do。表示与谓语动词同一时间发生或动作发生在谓语动词之后。
(2)不定式的进行式:to be doing。表示与谓语动词同一时间发生,并且动作正在进行。
(3)不定式的完成式:to have done。表示发生在谓语动词之前。
①The teacher seemed to have known about it.老师好像已经知道这件事了。
②I consider it a pity for you not to have attended our party.
我认为你没参加我们的聚会真是遗憾。
③There is said to have been many people waiting to see him when he arrived.(=It’s said that there had been...)
据说他到达的时候已经有很多人在等着见他了。
④They seem/appear to have known the fact.(=It seems/appears that
they have known the fact.)他们好像已经知道了真相。
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