高中英語選修八第二單元知識點
有用的知識才是真正的知識，知識的實用才有價值意義。智商的高低體現(xiàn)知識多少，情商的高低體現(xiàn)能力的大小。下面小編給大家分享一些高中英語選修八第二單元知識，希望能夠幫助大家，歡迎閱讀!
高中英語選修八第二單元知識1
課內(nèi)高頻詞匯
1.differ(vi.) 不同;相異→difference(n.) 不同;差異→different(adj.) 不同的
2.exact(adj.) 精確的;準確的→exactly(adv.) 精確地;準確地
3.undertake(vt.) 著手;從事;承擔→undertook(過去式)→undertaken (過去分詞)→undertaking (n.) 任務(wù);項目;事業(yè)
4.regulation(n.) 規(guī)則;規(guī)章;法規(guī)→regular(adj.) 規(guī)則的;有規(guī)律的
5.cast(vt.) 扔;投;擲→cast(過去式/過去分詞)
6.altogether(adv.) 總共;完全地
7.object(vi.) 反對;不贊成→objection(n.) 不贊成;反對;異議
8.moral(adj.) 道德(上)的;倫理的→morally(adv.) 道德上地;倫理上地
9.accumulate(vt. & vi.) 積累;聚積→accumulation(n.) 積累;聚積
10.assumption(n.) 假定;設(shè)想→assume(vt.) 假定;設(shè)想
11.shortly(adv.) 立刻;不久
12.retire(vi.) 退休;離開→retirement(n.) 退休，退職;退役→retired(adj.) 退休的;離職的
13.bother(vt.) 打擾(vi.) 操心(n.) 煩擾
14.resist(vt.) 抵抗;對抗→resistance(n.) 抵抗力;反抗→resistant(adj.) 有抵抗力的;耐……的
15.obtain(vt.) 獲得;贏得→obtainable(adj.) 可獲得的;可得到的
16.reason(n.) 理由;原因→reasonable(adj.) 合情理的;講道理的;公道的→unreasonable(adj.) (反義詞)不合情理的
17.fair(adj.) 公平的;適當?shù)?合理的→fairness(n.) 公平→fairly(adv.) 公平地;相當?shù)?/p>
高中英語選修八第二單元知識2
重點短語
1.pay_off 得到好結(jié)果;取得成功;償清
2.cast_down 沮喪;不愉快
3.have_a_great_impact_on 對……有重大影響
4.object_to 反對
5.in_favor_of 贊成;支持
6.owe..._to_ 把……歸功于……
7.(be)_bound_to_(do) 一定或注定(做)……
8.strike...into_one's_heart 使……刻骨銘心
9.from_time_to_time 不時;偶爾
10.bring...back_to_life 使復(fù)生;使復(fù)活
11.in_vain 白費力氣;枉費心機
12.in_good/poor_condition 狀況很好(壞);情況很好(壞)
課內(nèi)重點句型匯總
1.while表對比關(guān)系，“然而;可是”
Cloning plants is straightforward while(然而)cloning animals is very complicated.
2.當now，then位于句首，謂語是come，appear等時，主句完全倒裝。(小伙伴們記得去回顧一下必修五的倒裝句)that引導(dǎo)同位語從句
Then_came(傳來)the disturbing news that Dolly had become seriously ill.
3.Theadvantage is that...“其優(yōu)點是……”，that引導(dǎo)表語從句
The_advantage_is_that(優(yōu)點是)if there is a new illness some of these animals may die, but others willsurvive and pass on the ability to resist that disease to the next generation.
4.based on...“建立在……的基礎(chǔ)之上”，過去分詞作狀語
Based_on(建立在……基礎(chǔ)之上)what we know now, you can not clone animals that have been extinct longer than10,000 years.
高中英語選修八第二單元知識3
單元語法
復(fù)習同位語
1概念
同位語是句子成分的一種，位于名詞、代詞后面，說明它們的性質(zhì)和情況，它可以由名詞、代詞、名詞性短語或從句充當。
The program is attractive. The program is WhereAre We Going, Dad.
→The program, Where Are We Going, Dad, is attractive.
同位語的表現(xiàn)形式
同位語除可以直接位于所修飾的名詞、代詞后外，也可以用“suchas, that is, of, or”等詞引導(dǎo)。
The freezing temperature is the temperature at which water freezes under ordinary pressure. Freezing point is that too.
→The freezing temperature, or freezing point,is the temperature at which water freezes under ordinary pressure.
2同位語從句
概念：一個句子在復(fù)合句中起到同位語的作用，對前面的名詞進行解釋說明。這個句子被稱為同位語從句。
He told me the news—he would come home from abroad soon.
→He told me the news that he would come home from abroad soon.
3用法：同位語從句一般位于“fact,news, idea, truth, hope, belief, thought, doubt, question, promise,information”等抽象名詞后，解釋前面名詞的具體含義。
When will he come back? I have no idea.
→I've no idea when he will come back.
4同位語從句連接詞有“that,whether, who, which, what, when, where, why, how”等。
Should we continue to do the experiment?The problem has not been solved.
→The problem whether we should continue to do the experiment has not been solved.
5同位語從句與定語從句的區(qū)分：同位語從句所修飾的名詞在從句中不作成分;定語從句所修飾的名詞在從句中充當句子成分。
①Thenhe raised the question.
Wherewere they to get the machine needed?
→Thenhe raised the question where they wereto get the machine needed.(同位語從句)
②Doyou know the place? He was born in the place.
→Doyou know the place where he was born?(定語從句)