【例句精析】：
1) not only…but ….不仅而且。可以与
not only…but also, not only…,but…..aswell 替换
2) regard …as … / imagine… to be / consider +复合结构
This fundamental research is regardedas of great vablue.
We sometimes imagine a desert islandto be a sort of paradise when the sun always shines.
If you lived in the Mediterranean, forinstance, you would consider octopus a great delicacy.
【课文例句2】：After the alarm had been given, the great shipturned sharply to avoid a direct collision.
【例句精析】：
1) turn sharply / swerve sharply
change the course / diversion of traffic
2) give an alarm / sounda false alarm
After 引导的时间状语从句，如果从句动作在主句动作之前。从句用过去完成时，主句用一般过去时。
【高考真题链接】：2009年辽宁
My parents have promised to cometo see me before I _________ for Africa.
A) have left B) leave C) left D) will leave
解析： (B) 考查动词时态。由前句的现在完成时可以看出leave 还没有发生，是将来动作，但在状语从句中，用一般现在时表示将来。
【课文例句3】：The order to abandon ship was given and hundredsof people plunge into the icy water.
【例句精析】：Plunge: if someone or something plunges in a particular direction, theyfall, rush, or throw themselves in that direction.
à The car plunged into theriver.
à Rainstorms, floodsplunge China into emergency.
à Chinese shares continuedto plunge on Tuesday following a two-percent decline the previous trading dayas concerns linger over the country's real estate market.
【高考真题链接】：2009 年安徽
The play________next month aims mainly to reflect the local culture.
A. produced B. being produced C. to be produced D. having been produced
解析：不定式表示将来，the play to beproduced next month 下个月将要演出的戏剧