Unit 4 Topic 2 Section C 考点 2023-2024学年仁爱科普版九年级英语上册

仁爱英语九年级上 U4T2SectionC考点&练习 考点讲解 考点一Its diameter is 53% as wide as that of the earth.(P93) 它的直径是地球直径的百分之五十三那么宽。 The gravity on the surface of Mars is about two-fifths as strong as it is on earth.(P93)火星表面的引力大约是地球表面引力的五分之二。 肯定句：as...as 意为“与……一样……”，常用于两者比较，形容询或副词原形。 否定句：not as...as 或not so...as 均可。 【拓展】 ①修饰 as...as结构的常见词语有nearly ，almost,just, exactly, hall, quite, twice. three times 等,这些修饰语都只能放在 as...as结构之前(而不能置于其中或其后)。 ②表示“A是B的几分之几/百分之几/几倍” 结构“分数/百分数/倍数+as+adj原级+as+比较对象” e. g. This desk is twice as long as that one.这张桌子是那张桌子的两倍长， 考点二 So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. (P93) 所以一个人在地球上重90千克，在火星上只有36千克。 weigh 为动词 ， 意为“重;有……重;称重”， weight，名词 ， 意为“重量”。 【拓展】询问重量的句型: ①How much does/do... weigh? ②What's the weight of...? e. g. You must weigh the benefits against the cost.你一定要权衡利益与成本。 We'll need to reduce the weight by half.我们得把重量减轻一半。 【能力提升】 1.这块肉重五磅。 This piece of meat_______________(weigh) five pounds. 2.(2020·桂林中考)She is too thin and her______________(weigh/weight) is only 35 kilos. 3.这头大象有多重? a. How much does the elephant_________________? b. What's the ___________________of the elephant? 考点三 It takes a spaceship about eight months to reach Mars from the earth when the two planets are closest to each other. (P93) 当火星和地球距离最近的时候,乘坐宇宙飞船从地球到火星需要大约8个月的时间。 It takes/took sb. + 时间 + to do sth.做某事花费某人多少时间 【拓展】 表示“花费”的take，cost，spend，pay用法区别(详见 Unit 2 Topic 3 Section C 【能力提升】 昨天晚上我花了两个小时做作业。 考点四 Scientists are still searching for more information about Mars.(P93) 科学家们仍然在搜索更多关于火星的信息。【辨析】 词(组) 用法 例子 search for for 表示目的，即找出某物，强调有具体的目标， search for a way 寻找一种方法 = look for =search 对象 search the Internet 查找网络 e.g. You can use a directory service to search for people on the Internet. 你可以利用网络的目录服务搜索人名。 We searched everywhere but we still couldn't find it.我们四处找，但还是没找到。 考点五 It has been two days since we landed on Mars.(P94) 自从我们登上火星到现在已经两天了。 “It has been/ It’s+ 时间段 + since 从句(从句用一般过去时)” 意为“自从……以来到现在已经有多长时间了”。 e.g.It has been ten years since I