上海牛津高一英语下unit4 lead-in

1、unit4 what are they? butterfly 蝴蝶蝴蝶dragonfly 蜻蜓蜻蜓 ant 蚂蚁蚂蚁 bee 蜜蜂蜜蜂 fly 苍蝇苍蝇 mosquito 蚊子蚊子 mantis螳螂螳螂 cockroach 蟑螂蟑螂 scorpion蝎子蝎子 spider蜘蛛蜘蛛spidersspiderswebsilk1. do you like spiders? why or why not?2. in your opinion, why are a large number of people afraid of spiders?3. if you happen to see a spi

2、der in a corner of your room, what will you probably do? will you scream or step it to death?4. if you are asked to talk about spiders, what adjectives would you use to describe them? my view on spiders is that they are _.unit four creatures large and smallfriend or enemy ?what do you know about spi

3、ders?（page48)true or false? 1. all spiders are dangerous to humans. among thousands of species of spiders in the world, few are dangerous.2. spiders are insects. 3. some spiders are 25cm in size. biggest spider: goliath bird-eater is as large as 30 cm in leg span.4. some spiders eat lizards and bird

4、s. spiders eat insects, other spiders, and even fish.spidersinsectsbody partslegs1-4: f f t t twothreeeightsixspiders vs insectseight walking legshead and thorax (胸部胸部) combinedabdomen（腹部）腹部）spiders vs insects格莱斯捕鸟蛛goliath bird-eater skimmingn1. what is the friend or enemy mentioned in the title?n2.

5、 whose friend is it?n3. and whose enemy?a spiderits a friend of humans.its an enemy of insects.match the main ideas with the relevant paragraphsnp1-5 properties & uses of spider silk np6-10 uses of spiders on pest controlnp11-14 uses of spider poisonnp15-17 introduction of the topic1. what is be

6、ttys response to the sight of a spider? she jumps in fright and shouts to kill it.2. what does winston think of spiders? he thinks that they are very useful creatures.scanning p1-5 introduction of the topicdifferent views on spiders.uses of spiders on pest controlseasonsspidersfarmersautumn /build_

7、for spiders, which look like_winter_ the winter /springemerge_ and _while insects are ready to attack farmers _.fill their empty_.the farmers fields are_ and they are_.shelterslittle tentssurvivehealthyhungrycropsstomachsprotectedhappyscanning p6-10 cone-shaped straw tentshelterssurvivethe propertie

8、s and uses of spider silkthe properties and uses of spider silk stronger than steellighter than a featheras elastic as a rubber bandp1214spacecraftartificial organsbulletproof vestuses of spider poisonuses of spider poisontreat brain disordersp15-17 the properties of spider silk stronger than steell

9、ighter than a featheras elastic as a rubber banduses of spider silkspacecraftartificial organsbulletproof vestin the field of agriculturein the field of sciencea:material sciencemedicinespiders eat insects, which serves as a natural method of pest control.new materials can be made from spiders silk

10、to be used in spacecrafts, artificial organs and bulletproof vests.b:spiders poison can be used to treat brain disorders in humans.winstons view: spiders are useful bettys view：nfrighteningnnastyntheir bites are poisonous and dangerousnegative sides of spidersanyway, at the end of the play, betty ge

11、ts winstons point :_we should try to understand things in nature and not destroy them.work in pairs and prepare for a report on why spiders are our friends. summary of spiders spiders are not_. they_ winter by living in _built by farmers. in spring, they eat _that attack farmers _. they make webs wi

12、th_, which is _, _ and_. scientists plan to use spider silk in_, etc. their poison can be used to treat_ _. therefore, spiders are_ of insects and _ of humans.insectssurvivesheltersinsectscropssilkstronglightelasticspacecraftbraindisordersenemiesfriendswe should try to understand things in nature an

13、d not destroy them.listen to the playwhile listening,while listening, nplease pay attention to its pronunciation, intonation and rhythm.nunderline the words or expressions that you are not familiar with.the pattern of play the scene begins with winston and his wife betty standing in their kitchen.nb

14、etty: (jumping in fright, and then shouting) kill it!nwinston: (calmly) certainly not.nbetty: why? you are not frightened of it, winston, are you? its only an insect. characters; stage directionacting out the play in pairsnpay attention to characters intonation and feelings.assignment1.recite the new words & expressions