cut down 砍倒，减少，降低，缩短 cut up 切碎 cut off切断，停止 cut sth from something 切下，割下 cut sth away 切除，剪去 35. fewer and fewer pandas 大熊猫越来越少
the importance of saving these animals 拯救这些动物的重要性
36.wild animals野生动物 sea life海洋生物 water pollution 水污染 37.only live for a short time because of illnesses由于疾病仅活很短的时间 38. make more homes for the pandas为大熊猫建造更多的家园 39.stop putting rubbish into the sea停止往大海里丢垃圾 40. in the remaining forests在剩下的森林里
41. another 同类事物（三个以上）的另一个 I don't like this one, please show me another. some... others一些，另一些Some boys are reading; others are listening to the radio.
one ... the other 表示两者里另一个I've bought two sweaters . One is for you and the other is for my brother. other+复数名词 Where are the other students?
二、形容词和副词的比较级和最高级 一、规则变化
1.一般在词尾直接加er或est， tall-taller-tallest，long-longer-longest 2.以不发音的字母e结尾的单词在词尾直接加r或st， nice-nicer-nicest 3.以辅音字母+y结尾的词，把y变为i，再加er或est， heavy-heavier-heaviest
4.重读闭音节，末尾只有一个辅音字母，双写这个辅音字母，再加er或est， big-bigger-biggest 【注】: 大,红,湿,热,悲,瘦,胖.双写末辅再变级.（big/red/wet/hot/sad/thin/fat ）
5.部分双音节词和多音节词分别在原级前加more构成比较级和most构成最高级， beautiful-more beautiful-most beautiful
【注】:表示否定意义在其前加less /least important----less important----least important English is more interesting than Chinese =Chinese is less interesting than English . 6.由 “形容词+ly”构成的副词,在其前加more/ most
slowly---more slowly----most slowly；但early—earlier---earliest
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二、不规则变化 原级 good/well many/much little old bad/badly/ill far 比较级 better more less old / elder worse 最高级 best most least old /eldest worst farther (距离)/further（程度） farthest /furthest 注: 形容词,副词同形有: back , high , well ,fast, early, late ,straight 三、常见用法
as…as ,(与…一样） not as（so)…as （与…不一样）中间用原级。 形容词或副词的比较级+than。如：You are taller than Tom. 你比Tom高。
可修饰比较级的词 a bit, a little, rather, much, far, a lot, a great deal, any, still, even. I am even less lucky. She is far better than me at writing.
This pen is much better than that one. Tom is a little shorter than his friend Jim.
比较级必须在同类中进行，即人与人比，物与物比，而且比较结构前后的词语要对称， 特别注意在than或 as 之后不要漏掉可能出现的替代词 that ，those, one ,ones.
The new building is higher than the old one. Those apples are bigger than these ones.
如果主语是物主代词+名词，那么后面要用名词性物主代词His shirt is more expensive than mine. than前后句子的时态相同。通常用be动词、情态动词can, may, must, could, should和助动 词do, does ,did, will，have等来简答。
Kate is more beautiful than Lily is. She is five years older than I am. I drink more tea than he (does).
形容词的比较级 + and + 形容词的比较级 （前后形容词是同一个） 越来越……
She is becoming thinner and thinner. Our country is becoming richer and richer.
There are more and more students in our school. Living in the world is becoming more and more difficult.
the + 形容词的比较级 + …… + the +形容词的比较级 表示“ 越……，就越……”
The more you eat, the fatter you will be. The harder you study, the more you will get. The smaller the house is, the less it will cost. The sooner, the better.
表示“……是……的几倍”，用“倍数+as+原级+as”结构，或者“倍数+比较级+than”结构。
This classroom is three times as big as that one. This classroom is twice bigger than that one.
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