高中英語(yǔ) unit4 using language教學(xué)課件 新人教版必修2.ppt

Reading II,what are they?,dinosaurs,milu,dodos,Guess: What the reasons might be for their disappearance?,Using language,Reading,1. When did dinosaurs live? Tens of millions of years ago. 2. When did dinosaurs die out? About 65 million years ago.,3. How did dinosaurs die out? A large rock hit the earth and put too much dust into the air. The earth got too hot to live on.,Tens of millions of years ago, long before humans came into being.,A bird-like dinosaur which could not only run but also climb trees.,Maybe thats because a large rock hit the earth or because the earth got too hot to live on.,Detailed Reading,1. They lived on the earth tens of millions of years ago, long before humans came into being and their future seemed secure at that time. 點(diǎn)撥1 本句是一個(gè)由and連接的并列句，其中，long before 引導(dǎo)時(shí)間狀語(yǔ)從句，進(jìn)一步解釋說(shuō)明tens of millions of years ago，意為“在之前很久”。注意：before long 意為“不久以后”。,Language points,點(diǎn)撥2 on the earth. 在地球上。在earth, sun, moon等表達(dá)世界上獨(dú)一無(wú)二的名詞 前, 要加the。 點(diǎn)撥3 come into being的意思是“開(kāi)始存 在;發(fā)生”。,l例：It _ long before we_ the result of the experiment. A. will not be; will know B. is; will know C. will not be; know D. is; know,拓展：before long 不久以后,2. When scientists inspected the bones, they were surprised to find that these dinosaurs could not only run like the others but also climb trees. 點(diǎn)撥 本句中的to find that .是不定式作原因狀語(yǔ)。不定式用來(lái)表原因時(shí)，常修飾表示情感、心理狀態(tài)、性格等的形容詞，如：,3. Some scientists think it came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air. 點(diǎn)撥 本句中when引導(dǎo)定語(yǔ)從句，其先行詞為incident。關(guān)系副詞when 的先行詞一般是表時(shí)間的名詞，如: He came last night when I was out. 但有時(shí)并不直接是表時(shí)間的名詞，如：,4. According to a UN report,. according to 根據(jù), 據(jù)說(shuō) According to John, the bank closes at 4 p.m. Each man will be paid according to his ability.,