重点知识解析与拓展
1. I Can you think of alternatives we would u today?
你能想出我们今天会用到哪一种吗？
【例证分析】
algiersalternative n.选择对象
have no alternative but to do sth.：只能做某事
We have no alternative but to go on.
除了继续下去，我们没有选择的余地。
There was no other alternative but to fight till the victory.
除了战斗直到胜利，别无选择。
我没有钱，所以，我没有选择，只好呆在家里。
I had no money, so I had no alternative but to stay at home
【思维拓展】
alternative n.[C]可能的选择，可能性之一。近义词，choice。
翻译英文adj. 选择性的, 二中择一的
另一种方式：alternative means; 另择群体:the alternative society
这条路被堵塞了，我们不得不走另一条路。
he way was blocked, so we had to go by. alternative road
alternative v.交替；轮流alternatively adv.交替地，作为另一种选择的
2. Make a tentative guess about what Peking Man might have done and ud thousands of years ago.暂且猜猜几千年前“北京人”可能做的事情和用的东西。【例证分析】
tentative adj. 试验性的, 试探的, 尝试的, 暂定的，在句中作前置定语和表语。a tentative schedule. 是个试验性的计划
We have made a tentative arrangement to meet next month. 我们暂约定下月见。我只能给出一个不确切的意见。
I can only give a tentative opinion。
我的看法仅作尝试。
My opinion is only tentative.
【思维拓展】
作尝试性的出价、建议：make a tentative offer ;
获得暂时的结论：come to a tentative conclusion
3.You must be aware that it’s here that we found evidence of some of the earliest people who lived in this part of the world.
gsq
【例证分析】
强调句型的用法：强调句句型It is/was+被强调部分+that…将被强调的部分放在前面，其它部分置于th
at之后。被强调部分可以是主语，宾语，表语或状语。强调的主语如果是人，that可以由who换用。如果把这种句型结构划掉后，应该是一个完整无缺的句子。这也是判断强调句型与其它从句的方法。
It was about 600 years ago that the first clock with a face and an hour hand was made.
It was they that (who) cleaned the classroom yesterday.
fbl是什么意思It was in the street that I met her father.
原句：My father did the experiment in the lab yesterday evening.
强调主语：It was my father who did the experiment in the lab yesterday evening. 强调宾语：It was the experiment that my father did in the lab yesterday evening. 强调时间：It was yesterday evening that my father did the experiment in the lab. (注意不用when)
强调地点：It was in the lab that my father did the experiment yesterday evening. 【思维拓展】It is not until + 被强调部分+ that ...
该句型也是强调句型。主要用于强凋时间状语，译成汉语“直到……才……”，可以说是not ... until ... 的强调形式。
It was not until she took off her dark glass that I realized she was a famous film star.
= Not until she took off her dark glass did I realize she was a famous film star.
= I didn't realize she was a famous film star until she took off her dark glass.
4. I am sorry to interrupt you but how could they live here?
对不起，打断一下，但是，他们是如何生活在一起的呢？
【例证分析】
interrupt v中断，打扰，打断，插嘴诉诸法律
Rain interrupted our baball game.下雨中断了我们的捧球比赛。
The baby interrupted me while I was on the phone.
我在打电话时，婴儿干扰了我。
Traffic in the city was interrupted by a snowstorm. 市内交通被暴风雪所阻断。
theslam
It is rude to interrupt.打断别人的话，是不礼貌的。
“Don't interrupt,”he said. 他说：“别插嘴”。
他中断大学学业到军队去服役。(He interrupted college to rve in the army.) 我忙的时候，请不要来打扰我。(Don’t interrupt me when I am busy.)
在别人讲话的时候插嘴是不礼貌的。(It is not polite to interrupt when someone ishonor什么意思
talking.)
你继续讲下去，我不想打断你说话。(Go on, I don’t want to interrupt.)
【思维拓展】
interrupt sb/sth with sth. 用…打扰/打断
interrupter n.造成中断或中止的人或事物
bothofinterruption n.[U]中断、中止[C]阻碍物，障碍物
5. So we think it is reasonable to assume they lived in the caves, regardless of the cold.
因此，我们假想他们不顾寒冷而住在这些山洞里是合情合理的。
【例证分析】
assume v.假定，以为；装作，担任，承担。后多跟宾语；宾语+to be +n./adj或that 从句。
I assume you always get up at the same time.
我想你总是在同一个时间起床。
我假定那是错误的。（I assume it to be wrong.）
我来承担责任。（I assumed the responsibility.）
她装出国外腔调，但我们仍听出来了。（She assumed a foreign accent, but I still
recognized her.）
我想是这样的。（I assume that it is so.）
【思维拓展】
suppo 近似于think，但含有不确切之意，比think 缺少根据
guess 凭想象加以猜测
imagine 想象
fancy 凭空想象
【例证分析】
regardless adj.（与of连用）不管…的；不顾…的
He says what he thinks, regardless of other people's feelings.
他怎么想就怎么说，不考虑别人的情绪。
regardless of 不注意、不顾、不管
他不注意自己的外表。（He is regardless of his appearance.）
他不顾危险地去了。（He went regardless of the risk.）
【思维拓展】
近义词/短语：disregarding /in spite of 三者意义和用法相同，区别不大。regardless adv.无论如何；不管；不顾
I must make the decision regardless.不管怎样我得做决定。
regardlessness n. 不注意。
6. It ems that they ud sharpened stone tools to cut up the animals and remove their skin. 看起来他们可能是用尖锐的石器切开动物，把他们的皮剥下来。
【例证分析】
sharpen v.使变得锋利；变得清晰；变得尖锐，变得刺耳。
他正在削铅笔。（She is sharpening a pencil.）
随着天色转亮，树的轮廓也变得清晰了。（The outline of the trees sharpened as
it grew lighter.）
他在变得不耐烦时，说话的声音也变尖了。（His voice sharpened as he became
saimpatient.）
【思维拓展】sharp adj.1)锐利的，锋利的，尖的
a sharp knife锋利的小刀
a needle with a sharp point针头尖利的针
2)思维敏捷的；目光敏锐的；听觉灵敏的
sharp eyes灵敏的眼睛
The famous writer is still sharp in thought though he has attained the age of ninety-two.
这位著名作家虽已九十二岁高龄，但仍然思维敏捷。
sharp adv.1)准时地；整
at ven o'clock sharp七点整
2)突然地，急剧地
turn sharp to the left猛然向左转
【例证分析】
cut up 切碎；使伤心，严厉批评
彼得，为何不把蔬菜切碎呢？（Peter, why not cut up vegetables?）
爱丽丝丢了钱，她伤心极了。（Alice was badly cut up by losing the money.）红军很快摧毁了敌军。（The Red Army soon cut up the enemy’s forces.）【思维拓展】
由cut 组成的常用词组：
cut off 切断；剪掉
cut down vt.砍伐；削减
cut in 打断Don't cut in while I'm talking. 我说话时别插嘴。
7. After that they would rub an ample amount of salt onto the skin to make it soft.
larva
然后，他们可能在兽皮里边擦上大量的盐，使皮变柔软。
【例证分析】
ample adj. 足够的，富裕的；宽敞的，大的
an ample reward. 优厚的报酬
Ample food and clothing by working with our own hands. 自己动手，丰衣足食。
我们有充足的旅费。（We have ample money for the journey.）
