Usinghishybridrice,farmersareproducing.pptVIP

Using his hybrid rice, farmers are producing harveststwice as large as before. 翻译：用他的杂交水稻种子，农民们种出的粮食比以前多了一倍。 形容词原级as…as的前面可以用倍数词（如half,a quarter,twice,three times等），意为〝是…..多少倍〞。 eg：We got three times as many people as we had expected. 来的人数是我们预料的三倍。 The bedroom is twice as big as the kitchen. 卧室是厨房的两倍大。 倍数表达法 ①倍数+as…..as….. 是……的多少倍 eg：This book is three times as thick as that one. 这本书是那本书的3倍厚。 ②倍数+比较级+than eg：This book is three times thicker than that one. 这本书比那本书厚3倍。 ③倍数+the+名词（size/height/weight/length……. +of） eg：This book is three times the thickness of that one. 这本书的厚度是那本书的3倍。 扩展 常规句型的变形： ①…. times+more+名词（可数或不可数） +than+被比较对象 eg：There are five times more books in our library than in your. 我们图书馆的书比你们图书馆的多5倍。 ②….times as many/much+名词+as+被比较对象 eg：There is four times as much water in this pot as in that one. 这只壶里装的水是那只壶里的4倍。 ③….times+over+被比较对象 eg：The grain output in that village this year is twice over that of 2009. 那个村今年的粮食产量是2009年的两倍多。 ④…..times+that+of+被比较对象 eg：In this workshop, the output of July was 4.5 times that of January. 这个车间7月份的产量是1月份的4.5倍。 ⑤….times+compared with+被比较对象 eg：The number of the students in our school has increased 4 times compared with 1980. 我们学校的学生人数比1980年增加了4倍。 ⑥…..times+what+从句 eg：The production is now three times what it was ten years ago. 现在的产量是10年前的3倍。 * * *