Unit7.2第七单元专题7.2SectionB-⼋年级英语⼈教版（下册）
Unit 7 What’s the highest mountain in the world?
课时2
Section B 1a-3b
1. This elephant weighs many times more than this panda. 这只⼤象⽐这只⼤熊猫重很多倍。
（1）weigh既可作及物动词，表＂称重＂，也可作连系动词，表＂有……重；重＂。
I weighed the box. It weighs 20 kg. 我称了这个盒⼦，它重20公⽄。
She is afraid of becoming fat. She weighs herself every day. 她怕发胖。每天都称体重。
【知识拓展】
He ____________（weight）only 70 kilos now after taking a balanced diet.
【答案】weighs
（2）time在此意为＂倍数，次数＂，表⽰三倍或三倍以上时使⽤。表⽰＂A ⽐B长（宽、⾼、⼤、重等）N倍＂时，其结构为＂A＋be＋基数词（N＋1）＋times＋形容词⽐较级＋than＋B ＂。
This hall is five times bigger than our classroom. 这个⼤厅⽐我们的教室⼤四倍。
I have been to Beijing three times. 我去过北京三次了。
【注意】＂两倍＂可⽤twice表⽰。
【知识拓展】
其名词形式为weight。常⽤短语：in weight在体重⽅⾯。
The boy weighs 20 kg.
＝The boy is 20 kg in weight.
这个男孩重20公⽄。
表⽰＂A 的长度（宽度，⾼度，⼤⼩，重量等）是B 的n倍＂，可⽤＂A ＋be ＋基数词（N）＋times ＋as ＋形容词原级＋as ＋B＂结构。
This tree is three times as tall as that one. 这棵树是那棵树的三倍⾼。
His father is twice as old as he. 他⽗亲的年纪有他两倍⼤。
—I hear you’ve bought a new house.
—Yes, it costs too much. Anyway, it’s ___________ my old one.
A. twice as big as
B. as twice big as
C. bigger two times than
D. two times bigger as 【答案】
A
2. A panda can live up to 20 to 30 years. ⼤熊猫能活20⾄30岁。
up to到达(某数量、程度等)；⾄多有；不多于。live up to指＂活到……岁＂。
There are up to seventy students in the classroom. 教室⾥学⽣不多于七⼗⼈。
The old man can live up to ninety years. 这位⽼⼈能活到九⼗岁。
Do you know his date of birth? 你知道他的出⽣⽇期吗？
【知识拓展】
It’s ___________ Mr Zhang ___________ teach us English.
A. up to；to
B. up to；for
C. up for；to
D. up for；for
【答案】A
【解析】考查动词不定式及固定短语的⽤法。句意：教我们英语要由张⽼师来决定。根据句意＂由……决定＂应是（be）up to；it在句中作的是形式主语，代替后⾯的不定式，故选A。
up to的其他含义：
（1）up to 直到；到……为⽌
Up to now everything has been successful. 到⽬前为⽌，⼀切都很顺利。
（2）up to sb. 某⼈的责任；由……决定
I think I will leave it up to you. 我想让你决定。
3. At birth, a baby panda is about 0.1 to 0.2 kilos. 出⽣时，⼀只⼤熊猫宝宝⼤约0.1到0.2千克重。
birth n. 出⽣；诞⽣。常见搭配：
at birth出⽣时
date of birth出⽣⽇期
give birth to⽣孩⼦
What’s your date of birth?你是哪天出⽣的?
【易混辨析】born/birth
(1) born是bear的过去分词，意为“出⽣”，常⽤结构:sb.was/were born。
I was born in summer in 1988.
我出⽣于1988年的夏天。
(2) birth是名词，意为“出⽣，诞⽣，分娩”，反义词是death，意为“死，死亡”。
She gave birth to a girl last night.
她昨晚⽣了⼀个⼥孩。
4. Panda keepers are preparing milk for the baby pandas’ breakfast. ⼤熊猫饲养员正在准备⼤熊猫宝宝的早餐⽜奶。
prepare sth. for sb./sth. 给……准备……。
She prepared a nice breakfast for us. 她给我们准备了可⼝的早餐。
【知识拓展】
—Can you go to the beach with me?
—I’d love to. But I have to _______________ tomorrow’s exam.
A. look for
B. ask for
C. prepare for
【答案】C
5. …they find that most of the babies are already awake and hungry. ……他们发现⼤多数的⼤熊猫宝宝已经醒来并且饿了。
awake此处⽤作形容词，意为“醒着的”，它在句中常作表语。反义词是asleep。
Is he awake or asleep？他是醒着还是睡着了？
注意：awake不⽤于名词前作定语。
【易混辨析】awake与wake
awake形容词，意为“醒着”，常⽤作表语
wake动词，意为“弄醒；醒”，常与副词up连⽤
It’s eleven at night. He is still awake. 夜⾥⼗⼀点了，他还没有睡。
Please wake me up at six in the morning. 请早上六点叫醒我。
After working all night，Kate couldn’t stay____________the next morning.（wake）
【答案】awake
6. …, they run over to them with excitement and some of the young pandas even walk into their friends and fall over! ……它们兴奋地跑向他们，其中⼀些年幼的⼤熊猫甚⾄撞上⾃⼰的伙伴⽽跌倒。
（1）excitement n.激动；兴奋。
The excitement of the games has made them tired. 做游戏的兴奋使他们很疲劳。
【易混辨析】excite、exciting、excited、excitement
The news excited everybody. 消息⿎舞了每excite 动词，意为＂使兴奋，使激动＂。
个⼈。
exciting
意为＂令⼈兴奋的＂，主语⼀般是
物，在句中作表语或定语
The news is so exciting that we can’t go to
sleep. 这个消息让我们兴奋得⽆法⼊睡。
excited
形容词，意为＂兴奋的＂，多指⼈
受到事物的影响，主语⼀般是⼈，
在句中作表语。be excited about表
⽰＂对……感到激动＂。
We are very excited to hear of your success.
听到你们的成功，我们⾮常兴奋。
excitement
名词，意为＂激动，兴奋＂。to one’s
excitement意为＂使某⼈兴奋的是＂。
To my excitement, our team won. 让我兴奋
的是，我们队赢了。
How ______________ it is to watch the new film!
A. excitement
B. excited
C. exciting
D. excitedly
【答案】C
（2）fall over表⽰＂绊倒，摔倒＂。
She hit him so hard that she fell over. 她重重地撞击他，结果⾃⼰摔倒了。
【易混辨析】fall down、fall off、fall over
fall down
强调的是＂向前摔倒、跌倒＂，后
⾯不接宾语。
The boy hit the tree so hard that he fell down.
weight短语男孩重重地撞在树上，结果⾃⼰倒下了。
fall off
强调的是＂滑倒、倒下＂，后⾯接
宾语时应加上介词from。
The girl is falling off the bike.
（＝The girl is falling down from the bike.）
⼥孩正从⾃⾏车上摔下来。
fall over[来
源:Z+xx+www.doczj/doc/e433fedacd7931b765ce0508763231126fdb7747.html ]强调的是＂跌落、从……掉下来＂，
后⾯不接宾语。
I saw the little girl fall over. 我看到这个⼩⼥
孩跌倒了。
There is too much snow on the ground. If you walk too fast, you will ______________.
A. fall over
B. fall off
C. fall down

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