21、For the past+时间,S+现在完成式……(过去……年来,……一直……) 8 |4 L4 B0 x2 M( X
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。 0 V6 w% h. e% Y. U% j% w
22、Since+S+过去式,S+现在完成式。 / D2 x" M/ L/ t8 ~; ]& K 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。 ; T9 k8 i: m0 a2 F, Y/ V1 T9 Y! T
23、It pays to+V ~ (……是值得的。) . k+ F3 b7 j0 _
例句:It pays to help others.帮助别人是值得的。 中华考试网(www.Examw。com) p; W! ?7 p( J* U, T4 x; r
24、be based on (以……为基础) % X( A9 Y5 \# F- ]7 a' U+ N2 k 例句:The progress of thee society is based on harmony.社会的进步是以和谐为基础的。 # G8 S+ C j# c6 E 25、Spare no effort to+V (不遗余力的) % ]# Q3 N2 p/ Q3 C1 y2 a- C
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。