人教版2017高中英语(必修三)Unit 4 Astronomythe science of the stars 4.2 (PPT课件)

X 新知导学 D 答疑解惑
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1.As a result of this event,a great dust cloud formed in the sky blocking out the sunlight.(P29) 正因为这一事件,天空中形成了一团巨大的尘云,挡住了阳光。 剖析本句中的动词-ing短语blocking out the sunlight在句中作结 果状语,句子的主谓部分与分词之间含有逻辑上的因果关系。动词 -ing短语在句中作结果状语时,通常位于句末,中间可以用逗号隔开, 也可以不用。如: ①The new machines will work faster,thus reducing our cost. 新的机器将运转得更快,因此降低了我们的成本。 ②Carbon burns in oxygen or air,forming carbon dioxide. 碳在氧气或空气中燃烧,形成了二氧化碳。
X 新知导学 D 答疑解惑
INZHI DAOXUE
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4.Now that everyone is here,let’s begin our discussion. 含义 既然 5.—What subject do you like best? —Biology. 含义 生物学
X 新知导学 D 答疑解惑
INZHI DAOXUE
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★考点 block out挡住,遮住(光线和声音);忘掉,抹去(不愉快的 事) ③The noise from the car blocked out the sound of our voices. 汽车的噪音把我们的声音盖下去了。 ④An ugly building blocked out the view from the window. 一座难看的大楼把窗外的景物遮住了。 ⑤I try to block out the unpleasant experience. 我尽力去忘记那段不愉快的经历。
X 新知导学 D 答疑解惑
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考点延伸 阅读下列句子,指出block的词组及意义。 ⑥Various barricades block off all the main streets of the city. 各种路障封锁住了城里所有的主要道路。 词组 block off 意义 封锁,封闭 ⑦The traffic is very heavy and has begun to block up the streets. 交通很拥挤,已经开始把街道阻塞了。 词组 block up 意义 阻塞,塞住
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X 新知导学 D 答疑解惑
INZHI DAOXUE
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3.When or where did the author feel strongest of the gravity of the earth? C A.On the moon. B.On the half way to the moon. C.At the very beginning. D.On their leaving from the moon. 4.What causes the author to feel that he becomes weightless on the moon? B A.Spaceship. C.His friend. B.Gravity. D.Good feelings.
SECTION Ⅱ— LEARNING ABOUT LANGUAGE,USING LANGUAGE,SUMMING UP & LEARNING TIP
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一、阅读下列句子,指出黑体词或词组的含义 1.The satellite will be used mainly to relay(转播) television programmes. 卫星 含义 2.Cheer up!You have another chance. 含义 振作起来 3.—Who is the man giving a speech in the hall? —He is Li Jiang,a famous physicist. 物理学家 含义
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二、阅读课文A VISIT TO THE MOON,根据课文内容判断正“T” 误“F” ( F )1.The force of gravity changed three times and the last change was the most powerful. ( T )2.We were too far from the earth to feel its pull. ( F )3.On the moon,our weight would be less than on the earth because we were too far from it. ( F )4.Leaving the moon’s gravity was as painful as leaving the earth’s. ( F )5.Space travel was very exhausting,so the writer didn’t like it at all.
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三、阅读课文A VISIT TO THE MOON,选择正确答案 1.The passage is mainly about C . A.an introduction of the moon B.the gravity that I felt on my way to the moon C.my visit to the moon D.my friend Li Yanping,an astronomer 2.From the text,we know that the force of the gravity would change times. B A.2 C.4 B.3