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……)
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)
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。