1、For the past51Test+ 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。

2、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。

3、It pays to + V...(…是值得的。)

例句：It pays to help others.

帮助别人是值得的。

4、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。

5、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。