话题 sevens inherent sins of human being

话题 as + adj as they can be

话题 be proud of sb to do

话题 waiting to be discovered这里做什么状语？

话题 there be sth/sb to do

话题 sb be adj to do sth

话题 be able to后面不能接被动式

话题 as well as could be expected

话题 The bride to be is Mary

话题 find sb to be doing sth

问题 A nice age to be这种结构该怎么理解

牛津必修三 Unit 1 Reading 中有这样一段话：Ah, twenty! A nice age to be. I was young once.请问这里该如何理解？

问题 to be done和to do

A lot of work to be done, he had to go to the office quite early.A lot of work to do, he had to go to the office quite early.这两句话哪个对，哪个错？错在哪了，请详细说明。之前的解答有的没看懂。

问题 be expected to 否定形式可以用 may not吗

...A traveler ___(not expected to ;know) all of these....请问空格处填入 may not be expected to know作为否定形式可以吗？

问题 后置定语用born还是to be born（表示已出生）

...ino calf (犀牛幼崽). When the tiny creature arrived on January 31, she became the 40th black rhino to be born at the reserve. And officials at Port Lympne were delighted with the new arrival, especially as black rhinos are known for being difficult to breed in captivity (圈养). 上面一段...

问题 to do/ to be doing/ doing 作定语时的区别

原句：There will be more than three hundred scientists attending the meeting...原句是还未发生的事情，为什么定语用attending，而不是to attend？  分词做定语相较不定式做定语区别是什么？如果用不定式，to attend 和to be attending 区别是什么？...