河南省沁阳一中高二英语《Unit7 The Sea Lesson 3 The Sea WorldPeriod 3 课文重难句导学》导学案目标：To master the important language points in this lesson.1. It’s three times as big underwater. 水下部分事水上部分的三倍。Some fish can produce sounds almost twice as loud as your speaking voice. 有些鱼发出的声音几乎是你讲话声音的两倍。解析：句中 three times as big 和 twice as loud as 意为“三倍大”和“两倍大”为倍数表达，是“倍数+as+形容词原级+as”结构，① 该句是省略句，其完整形式应为: It’s three times as big underwater as it is above the water.倍数表达法：1) 倍数词+as 形容词/副词原级+as +其他This rope is three times as long as that one.2) 倍数词+形容词/副词比较级+than +其他This rope is three times longer than that one.3) 倍数词+the +名词(size, height, weight, length, width 等)+of +其他This rope is three times the length of that one.应用: This restaurant wasn’t _____ other restaurant we went to.A. half as good as B. as half good as C. as good as half D. good as half as (A)2.You certainly won’t find a noisier fish.你绝不会找到比他们更吵闹的鱼。解析：句中 won’t…noiser 是形容词的比较级用于否定句中，表达最高级的含义，相当于 It is the noisiest fish in the world.当比较级与否定词 no,never,nothing 等连用时，表示“再没有……比…… 更……”,即”最……”之意。e.g. Nobody in the class is taller than Tom.=Tom is the tallest in the class.汤姆是班里最高的。I can’t agree with you more. 我完全同意你。Nothing is more valuable than health. 健康是最宝贵的。应用：How beautifully she sings! I have never heard_____.A. the better voice B. a good voiceC. the best voice D. a better voice (D)3. They are less colorful than some other fish but they move beautifully.它们不如其他一些鱼那么多姿多彩，但它们游起来很美。解析：less + adj.原级+than 表示“不及……；不如……”e.g. My brother...
