人教版必修三Unit 4 Astronomythe science of the stars language points學(xué)案.docx

unit 4 astronomy: the science of the stars language points學(xué)案【學(xué)習(xí)目標(biāo)】：掌握重點詞組和特殊句型的用法【學(xué)習(xí)重點】：提高學(xué)生對詞匯的應(yīng)用能力【學(xué)習(xí)難點】：總結(jié)重點詞組【教學(xué)過程】：、聯(lián)想記憶 1system n系統(tǒng) 2atmosphere n. 大氣層；氣氛 3presence n. 出席；到場；存在 4puzzle n. 謎；難題 5prevent.from. 阻止；制止 stop.from. / keep.from. 阻止做某事 6now that 既然 since 既然 7. harmful adj.有害的 be harmful to 對有害8. in time 及時；遲早，終于 on time 按時 sooner or later 遲早9. in ones turn 輪到某人 its ones turn to do sth. 輪到某人做某事 in turn 輪流；轉(zhuǎn)而 by turns 輪流、構(gòu)詞記憶 1theory n理論，學(xué)說 theoretical adj. 理論的 2globe n地球儀 global adj. 全球的 3like prep. 相似；像 unlike prep. 不同；不像 4exist vi.存在 existence n存在 5puzzle vt. & vi.(使)迷惑 puzzling adj. 令人迷惑的 puzzled adj.感到迷惑的 6biology n生物學(xué) biological adj. 生物的 biologist n生物學(xué)家 7. violent adj. 猛烈的,暴力的 violence n. 暴力,暴力行為、核心單詞與短語1、prevent v妨礙，制止；阻止；阻擋(stop) prevent一般常與動名詞搭配，后不接不定式，如表示“阻止某人做某事”，可以說prevent sb. from doing sth.，prevent sb. doing sth.或prevent sb.s doing sth.，但不能說prevent sb. to do sth.。 (1) he prevented the boy (climb)the_tree.他阻止了那個小男孩爬樹。(2)she tried to prevent ，but he still went.她試圖阻止他去，但是他不聽勸，還是去了。2、exist vi.存在；生活，生存(live) existence n.存在；生活，生活方式 exist in存在于之中 exist on靠為生 in existence存在come into existence產(chǎn)生；成立；出現(xiàn)，開始存在 【易錯提示】exist是不及物動詞，不用于被動語態(tài)，也不用于進(jìn)行時。 (1)用exist短語及其適當(dāng)形式填空 it was impossible for them to exist such a small income. unfortunately，they only exist the fancy world. no one knows when such a custom first came existence.(2)there has been no_evidence to prove the_of life on other planets.aconvincing；existence bconvinced；existencecconvinced；exist dconvincing；exist 3、remain v留下，遺留；保持不變，一直是 1指某事“尚待、有待于以后被處置”，后面常接不定式的被動形式，表示主語是不定式的承受者。此時它有兩個固定句型如下： sth./sb.remains to be 過去分詞；it remains to be seen whether引導(dǎo)的主語從句2.用作系動詞，意為“仍然；依舊；留；住；待”，后面可接名詞、代詞、形容詞、介詞短語、分詞作表語。尤其是其后跟動詞的v.ed形式，相當(dāng)于形容詞，指某人或某事物仍保持某種狀態(tài)。3.remaining adj.剩余的，剩下的 (1)用所給動詞的適當(dāng)形式填空 after the earthquake, very little (remain)of the city of tangshan. this problem remains (solve) please remain (seat)until the plane has come to a complete stop. he bought himself a gift with the (remain) money.(2)the fact _ that we are still lagging behind the other classes in maths.ais remained bis remaining cremains dremained4、in ones turn 輪到某人；接著in turn依次；轉(zhuǎn)而，繼而 by turns輪流；時而時而 in return作為回報take turns (in) doing / to do sth.輪流做某事 at every turn處處，事事，每次 用turn短語填空：(1)when it is ，im too excited to speak.(2) he asked each of us to describe how the internet had affected our lives. obviously mad，the poor woman laughed and cried .5、break out (戰(zhàn)爭、火災(zāi)等)爆發(fā)；突發(fā)break up打碎；解散；結(jié)束；開始放假；制止 break down出故障；失?。环纸?； (身體)垮掉break through 突破，取得突破 break away from 脫離，掙脫break in 打斷；闖入 break into 闖入；突然開始(大笑等)(1)用break短語的適當(dāng)形式填空 when the fire broke_out，many workers had escaped. when did you break_up with your boyfriend? mother and i had a discussion about how to visit beijing and my elder brother would sometimes break_in with a suggestion. my brothers bike broke_down yesterday，so he had to go to school by bus.)6、cheer up 感到高興；感到振奮 cheer sb./sth. up(使)高興起來；(使)振作起來 cheer sb. on為某人加油/鼓勁 (1)用適當(dāng)?shù)慕?、副詞填空he was far behind the others but they were still cheering him .hell cheer if you get him a beer.im taking angie out to cheer her .7、in time 及時；終于(eventually)；遲早(sooner or later，early or late) ahead of/ behind time 提前/拖后 on time 準(zhǔn)時，按時 for the time being 暫時in no time 立即，馬上 at no time 決不 take ones time 別著急；慢慢來make/ find time 抽/找時間 (1)用適當(dāng)?shù)慕?、副詞填空 the dam was completed two years ahead time. our train arrived right time. you can stay in the spare room the time being. jack got the car fixed no time at all.(2)完成句子 he jumped into the river to save the girl. 他跳進(jìn)河里及時救起了那個女孩。 work hard and youll succeed . 努力吧！你遲早會成功的。iv、重點句型: now that引導(dǎo)原因狀語從句：now (that)既然，相當(dāng)于since，用來引導(dǎo)原因狀語從句，引出一個事實，主句表示說話者的一個建議或想法。(1)完成句子 dinner is ready，wash your hands. 晚飯準(zhǔn)備好了，洗手去吧。 this is the last chance，you should catch it.既然這是最后一次機(jī)會，你應(yīng)該抓住它。(2)_ everyone is here，lets begin our game.anow that bthat cas if difv、單元語法：主語從句用主語從句改寫下列句子：(1)she left him something that cut him to the heart.what she left him cut him to the heart.(2)something that seems easy to some people seems difficult to others.what seems easy to some people seems difficult to others.(3)is he coming or not？it is still uncertain.it is still uncertain whether he is coming or not.(4)why did he do it？it remains a mystery.why he did it remains a mystery