仁爱版九年级上册英语Unit4 Topic2 SectionC 学案(无答案）.doc

1、Unit4 Topic2 SectionC 精品学案一、预习热身。翻译：A:be named after Mars_ at a distance of._53% as wide as._ two-fifths as strong as._be closest to each other_ search for more information_B:On the surface of Mars_ weight only 36 kilos_ the Roman god of war_ C:Its diameter is 53 as wide as that of the earth. _It ha

2、s been two days since we landed on Mars._二、重难点释疑。1. Its diameter is 53 as wide as that of the earth. 它的直径是地球直径的53。点拨：as形容词/副词原级as 名词 像一样 。思考：句中that指代_, 如果前面的名词是复数，用_指代。练习：a.我们学校像花园一样美。Our school is _ _ _ a park.b. Tom和Mike跑得一样快。Tom _ _ _ _ Mike.c.城市的楼比农村的高。The buildings in the city _ _ than _ in the

3、 country.2. Mars goes around the sun at a distance of about 228 million kilometers. 火星在相距大约两亿两千八百万千米的地方绕着太阳旋转。点拨: at a distance of 相隔 。拓展：at/from a distance 在远处 。3. The gravity on the surface of Mars is about two-fifths as strong as it is on earth. 火星表面的引力大约是地球表面引力的五分之二。点拨：倍数词/分数/百分数as 形容词或副词原级as “是

4、的几倍/几分之几/百分之几”。练习：a.这个盒子是那个盒子的四倍重。 This box is _ _ _ _ _ that box.b.这个房间是那个房间的三分之一大。This room is _ _ _ _ that room.4. So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. 因此，一个在地球上重90千克的人在火星上只有36千克的重量。点拨：a person who weighs 90 kilos on earth 一个重达90公斤的人 思考：句中第一个weighs是_句的_; 第二个weigh

5、s是_句的_5.It takes a spaceship about eight months to reach Mars from the earth when the two planets are closest to each other.在地球与火星最接近的时候，宇宙飞船需要用大约8个月的时间才能从地球到达火星。同义句：A spaceship _ _ _ _ _ Mars from the earth when 点拨：be closest to 离最近 。拓展：离近_;离远_。6.Scientists are still searching for more information

6、about Mars. 科学家们仍然在搜索更多有关火星的信息。 点拨：search 搜寻，搜索，搜查(动词) 。拓展：search sb. / sth 搜某人的身/搜某物，search for sb. / sth. 搜寻某人/某物。 练习:消防员在建筑物中搜寻幸存者。Firefighters were _ the building _ survivors.7.It has been two days since we landed on Mars. 我们登上火星已经两天了.同义句：It _two days _ we landed on Mars.练习：a.自我们上次上街购物已经是两个月了。It

7、 _ _ two months _we _ shopping.b.他父亲死了十年了。It _ ten years _ his father _. 同义句：a. His father _ ten years _. b. His father _ _ _ for ten years.8.Whats worse, our water supplies were very low. 更糟糕的是，我们的水供给是非常少。点拨：supply 供给(名词) 链接：supply 供应(动词) supply sth. for sb.= supply sb. with sth.给某人供应某物.9.I often miss the family, but the excitement of being on Mars is worth it. 虽然我经常思念家人，但火星探险的兴奋和冒险还是值得的。点拨：be worth sth. 值 ,链接： be worth doing sth. 某事值得做。练习：这事值得我们付出劳动。It _ _ our work.这本书值得一读。The book _ _ _