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二十一、For the past + 时间，S + 现在完成式...(过去...年来，...一直...)
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。
二十二、Since + S + 过去式，S + 现在完成式。
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。
二十三、It pays to + V ~~~ (...是值得的。)
例句：It pays to help others.
帮助别人是值得的。
二十四、be based on (以...为基础)
例句：The progress of thee society is based on harmony.
社会的进步是以和谐为基础的。
二十五、Spare no effort to + V (不遗余力的)
例句：We should spare no effort to beautify our environment.
我们应该不遗余力的美化我们的环境。
二十六、bring home to + 人 + 事 (让...明白...事)
例句：We should bring home to people the value of working hard.
我们应该让人们明白努力的价值。
二十七、be closely related to ~~ (与...息息相关)
例句：Taking exercise is closely related to health.
做运动与健康息息相关。
