例句：It pays to help others.

　帮助别人是值得的。

　例句：Since he went to senior high school, he has worked very hard.

　自从他上高中，他一直很用功。

　例句：For the past two years, I have been busy preparing for the

　examination.

　过去两年来，我一直忙着准备考试。

　例句：Summer is hot.That is the reason why I don't like it.

　夏天很炎热。那就是我不喜欢它的原因。

　Winter is cold. That is the reason why I don't like it.

　冬天很冷。那就是我不喜欢它的原因。

　It is obvious that + 句子 (明显的)

　It is apparent that + 句子 (显然的)

　例句：It is conceivable that knowledge plays an important role in our

　life.

　可想而知，知识在我们的一生中扮演一个重要的角色。

　例句：Since the examination is around the corner, I am compelled to

　give up doing sports.

　由于考试迫在眉睫，我不得不放弃做运动。

　例句：There is no one but longs to go to college.

　没有人不渴望上大学。

　There is no one but longs to be a millionaire.

　没有人不渴望成为百万富翁。

　例句：Those who break the law should be punished.

　违法的人应该受处罚。

　例句：It is time the authorities concerned took proper steps to solve

　the traffic problems.

　该是有关当局采取适当的措施来解决交通问题的时候了。

　例句：On no account can we ignore the value of knowledge.

　我们绝对不能忽略知识的价值。

　On no account can we ignore the importance of education.

　我们绝对不能忽略教育的重要性。