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。