Mainly Revision
book three unit 6 mainly revision
一、本單元知識目標
1.掌握以下單詞及用法：
badly allow deep understand amaze however colourful dead
society since cover earth ocean pollute group terrific sometime
deal shark alike attack africa warn appear
2.理解以下單詞：
explore explorer watchtower
3.掌握以下詞組及用法：
be amazed at clean up as long as on earth
4.復習1-5單元出現的日常交際用語
5.語法
復習現在完成時和賓語從句。
二、本單元課文難點講解
lesson 21
1. what have they gone there for? 他們為什么上那里去？
what…for = why
eg. what did you do that for? 你為什么這樣做？
= why did you do it?
lesson 22
1. not too long ago, people couldn't go scuba diving on hainan island, or anywhere else. 不太久以前，人們在海南島或任何其他地方還不能戴水肺潛水。
① not too long ago：不是很久以前
② not… or：既不…也不。
eg. he could not eat or drink gold. 他既不能吃也不能喝金子。
= he could neither eat nor drink gold.
the pupil doesn't like math or chinese. 這個小學生既不喜歡數學，也不喜歡語文。
= the pupil likes neither math nor chinese.
③ 該句中的else是一個副詞(adv)，常用于疑問詞和某些代名詞后。
eg. what else do you want? 你還要什么？
when else can we come again? 我們什么時候還能來呢？
little else remains to be done today.今天沒有什么事要做的了。
in the dark she hurried to put on someone else's coat.
黑暗中她匆匆忙忙地穿上了一件別人的外套。
we went to the museum and nowhere else. 我們到博物館去了,其他什么地方也沒去。
2. this was because there was no machine allowing a person to breathe under water for a long time. 這是因為沒有一種可以讓人在水底下長時間呼吸的機器。
句中的allowing用來修飾名詞machine。
3. in 1943 jacques cousteau and his friend made it possible by inventing the scuba machine.
1943年，雅克庫斯托和他的朋友發明了水下呼吸器，這才使得人們在水下長時間的呼吸成為了可能。
① … made it possible…中的it用來指代上文中的 "breathe under water for a long time"。
② by表示通過某種手段、方式等，后面常接動詞的-ing形式。
eg. she earned money by writing. 她靠寫作掙錢。
we went by air. 我們乘飛機走。
4. cousteau was very interested in diving deep into the sea. 庫斯托對深海潛水十分感興趣。
be interested in：對…感興趣。
5.as he explored the sea, he took pictures and videos of many things that people had never seen before. 在探索海洋的過程中，他對許多鮮為人知的事物進行了拍攝和錄像。
① 該句是一個復合句，其中包含一個由that引導的定語從句：that people had never seen before，用來修飾名詞things.
② as在該句中的意思是"當、正值"。
eg. he dropped the glass as he stood up. 他站起來時，把杯子摔了。