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重点句型
1. He claims to have seen a round black creature moving quickly through the water.
他声称看到一个圆形的黑色动物在水中快速游动。
2. It is 2,189 metres high and covers an area of about ten square kilometres.
它海拔2189米，占地约10平方公里。
3. There have been reports of monsters in Lake Tianchi since the beginning of the last century......
自上世纪初以来，一直就有关于天池怪物的报道……
句型探究
1. He claims to have seen a round black creature moving quickly through the water.
他声称看到一个圆形的黑色动物在水中快速游动。
to have done是不定式的完成式，主要有两种用法：
①不定式所表示的动作发生在谓语动作或状态之前。
②表示过去未能实现的愿望、打算、计划等。
常用形式为：wanted, planned, hoped, intended, meant, to have done。
Doctors claimed to have discovered a cure for the disease.
医生声称已找到了该疾病的疗法。
He pretended to have done his homework.
他假装已经完成了作业。
I wanted to have picked you up at the airport yesterday, but I was too busy.
昨天我本打算去机场接你，可我太忙了。
