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。 十六、Those who ~~~(……的人……)

例句：Those who violate traffic regulations should be punished.违反交通规定的人应该受处罚。

十七、There is no one but ~~~(没有人不……)

例句：There is no one but longs to go to college. 没有人不渴望上大学。

十八、be + forced/compelled/obliged + to + V(不得不……)

例句：Since the examination is around the corner，I am compelled to give up doing sports. 既然考试迫在眉睫，我不得不放弃做运动。

十九、It is conceivable that +句子(可想而知的) 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。

二十、That is the reason why ~~~(那就是……的原因)

例句：Summer is sultry. That is the reason why I don't like it. 夏天很燠热。那就是我不喜欢它的原因。

二十一、For the past +时间，S +现在完成式……(过去……年来，……一直……)