专题三形容词和副词.ppt

3.倍数表达法 (1)倍数＋as＋原级形容词(副词)＋as... (2)倍数＋the size/length/width/depth/height of... (3)倍数＋比较级＋than＋被比较对象 这棵树比那棵树高一倍。 This tree is twice as tall as that one. This tree is twice the height of that one. The tree is twice taller than that one. (1)“half ＋as＋形容词原级＋as” ……的一半…… My English is not half as good as yours. 我的英语不如你的一半好。 This town is half as big as ours. 这个城镇有我们城镇的一半大。 (2)“as...as”结构中，若形容词作定语修饰可数名词单数，不定冠词a(an)应置于形容词与名词之间。 English is as important a subject as maths. 英语是和数学同样重要的一门学科。 【温馨提示1】 对两个相同概念的词的对比，要特别注意不要漏掉后面的名词。 [辨析]　北京的冬天比上海要冷。 It is colder in Beijing in winter than Shanghai.(×) It is colder in Beijing in winter than in Shanghai.(√) 此句是对两个地点的天气进行比较，而不是对北京的天气同上海这一城市进行比较。常见的类似错误还有： Your pencil is longer than him.(him应为his) There are more students in Class 3 than Class 4.(Class 4应为in Class 4) 考点二　形容词最高级的用法 1.三者或三者以上相比较，用“the＋最高级＋名词＋范围”结构。 This is the cleanest place of the city. 这是这个城市最干净的地方。 Li Yun is the fastest of all the girls in our class. 李云是我们班女生中跑得最快的。 2.表示“最……之一”，用“one of the＋形容词最高级＋复数名词”。 The Great Wall of China is one of the greatest buildings in the world. 中国的长城是世界上最伟大的建筑之一。 This is one of the most interesting books that Ive ever read.这是我读过的最有趣的书之一。 3.否定词(no/not/nothing/never)和比较级连用可以表示最高级的含义。 We couldnt feel better.我们感觉太好了。 Nothing is more valuable than health.健康最重要。 考点三　几个无比较意义的比较级句型归纳 1.no more than ＝only 只有，仅仅，只不过 What he is saying is no more than a joke. 他所讲的只不过是个玩笑而已。 There are no more than a hundred people in the hall. 大厅里只有100人。 2.not more than＝at the most 不超过，至多 There are not more than a hundred people in the hall. 大厅里至多100人。 3.no less than 多达，不少于 He walks no less than five miles to school. 他上学至少要走五英里。 4.less than 不到，不太，极不 I wont take less than $5，000 for my car. 我的汽车低于5 000美元不卖。 The boys were less than happy about having a party. 开晚会男孩子并不很高兴。 Doctors have been less than successful in treating this condition. 医生在治疗这种病时极不成功。 5.more than 多于，超过(＝over，后接数词)；不只是(＝not only，后接名词、动词或副词)；非常，十分(＝very，后接形容词、副词、动词或分词)；难以，完全不能(用于more than...can...) He w