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。 二十八、Get into the habit of + Ving = make it a rule to + V (养成...的习惯) We should get into the habit of keeping good hours. 我们应该养成早睡早起的习惯。
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