《Module 5 A Lesson in a Lab》Grammar 课件 （外研版必修1）.ppt

Example: A: The Yangtze River is about three times as long as the Songhua River. B: The Yangtze River is about three times longer than the Songhua River. C: The Yangtze River is about three times the length of the Songhua River. Practice Complete the sentences according to the chart. Mars is ____________ the earth. (big) Jupiter is _______________ from the sun than the earth. (far) Earth Mars Jupiter Diameter(直径) 1 0.5 11 Distance from the sun 1 1.5 5 half as big as five times further Study the sentences and make a conclusion of the comparative structure of adjectives. The brown house’s windows are twice as wide as those of the white house. My handwriting is not half as good as yours. This room is three times as large as that one. 小结: (1) 倍数＋as＋形容词＋as… The white box is four times deeper than the black box. This road is twice longer than that one. The plane flew nine times higher than the kite. 小结: (2) 倍数＋形容词的比较级＋than… The red building is twice the height of the grey building. Our school is three times the size of yours. The street is four times the length of that one. 小结: (3) 倍数＋the size (length, width, height, depth) ＋of… ②倍数+形容词比较级+than … ③倍数+the (size, height, length, weight, width, depth, age) +of … ①倍数（half, once, twice, …times） +as+形容词+as * * 外研版 高一年级 (必修1) Module 5 Grammar 1）原级比较：表示两者程度相同。用句型as+形容词/副词+as表示, 否定名式为: not as/so+形容词/副词as。 如： Dick is as tall as his brother. Tom speaks as quickly as his cousin. I have never seen a person as / so clever as he is. 一.形容词和副词比较等级的用法 2）比较级： A. 表示A超过B。此时使用形容词和副词的比较等级。如： Our classroom is brighter than yours. Dogs run faster than rabbits. I don’t think math is more important than physics. B. 表示A不如B。 用句型：less+形容词/副词的原级表示。如： Rabbits ran less fast than dogs. Jenny is less clever than her sister. It rains less often here in autumn than in spring. 3）形容词和副词比较级的特殊用法 A. 越来越…… 如： You are growing taller and taller. 你越长越高了。 English is becoming more and more important. 英语越来越重要了。 B. 越……， 越…… 如：