外研版 (2019)选择性必修 第一册Unit 5 Revealing nature精品ppt课件

这是一份外研版 (2019)选择性必修 第一册Unit 5 Revealing nature精品ppt课件，共19页。PPT课件主要包含了be writing，have gone，reported，thatwhich，cheating，detective，detection，Writing等内容，欢迎下载使用。

Part 1 Cmprehending the Reading TextPart 2 Learning VcabularyPart 3 Writing
1．Which is NOT a bean plant des when it is attacked by insects?A．T release tiny amunts f chemical t warn its neighbur.B．T release chemical t drive the insects away.C．T release chemical t drive the wasps.D．T release chemical t attract wasps.2．Hw can a chilli plant tell if its neighburing plants is helpful?A．By prducing chemical. B．By sunds.C．By wd wide web. D．By insects.3．Why “wd wide web” is similar t the Internet we use?A．Because it can use it t cmmunicate. B．Because it is linked tgether.C．Because it can share infrmatin. D．Because it can share fd.
Read and chse
The secret language f plants
重点句式1　be said t据说……(教材P56)　Alexander the Great and Marc Pl were said t have visited such a tree in India.据说亚历山大大帝和马可波罗在印度都去看过这样一棵树。句式分析：sb./sth.is said...，是一个被动语态的谓语形式，常译为“据说……”，此结构中被动语态的谓语动词后总是跟一个不定式。[例1]　He was said t have lst his will t live.据说他已经失去了生存的意志。[例2]　They are said t cntrl large parts f the east and suth f the cuntry.据说他们控制了该国东部和南部的大片地区。
(1)本句型中的不定式可用一般时、进行时或完成时，分别表示与谓语动词动作同时发生或在其后发生的动作或状态、与谓语动词动作同时发生的进行动作或在谓语动词动作之前发生的完成动作。(2)类似句型：sb./sth.is believed/reprted t d sth.＝It is believed/thught/hped/reprted that...人们相信/认为/希望/据报道……
重点句式2　way后面跟定语从句(教材P57)　Scientists are learning mre every day abut the secret ways in which plants talk t each ther.科学家们每天都在了解更多关于植物相互交流的秘密方式。句式分析：本句是一个复合句，in which引导的定语从句修饰先行词ways。[例]　I liked the pen，hnest way in which the man talked t me.我喜欢那个人和我坦率、诚恳的谈话方式。(1)way后面的定语从句还可以用that引导，或不用关系词。(2)way作先行词，如果关系词在从句中作主语、宾语，只能用that或which，作宾语时，that及which均可省略；作状语时，关系词用that或in which，并且还可省略。
that/in which
Learning Vcabulary
detect v．发现，察觉(尤指不易察觉到的事物)(教材P56)　When anther bean plant detects the chemicals frm its injured neighbur，it starts t release its wn，different chemicals.当另一棵豆秧察觉到从它受伤的邻居身上释放出的这些化学物质时，它开始释放自己的不同化学物质。[例1]　The dentist culd detect n decay in her teeth.牙科医生检查了她的牙，没有发现龋齿。[例2]　The tests are designed t detect the disease early.这些检查旨在早期查出疾病。
Explring the Theme f the Text
Grup discussin
What des “wd wide web” mean?What d yu think are the benefits f studying plant cmmunicatin?
本单元写作项目是描写植物生长过程的观察日志。[基本框架]1．开头(beginning)——写作目的2．主体(bdy)——植物成长的过程3．结尾(ending)——感受
[常用词块]1．grwth cnditin f the plant植物生长条件2．a hle large enugh一个足够大的洞3．put the earth back in the hle把土回填到洞里4．up t 20 feet in length长度达20英尺5．select prper seeds挑选合适的种子6．a light applicatin f fertilizer使用微量的肥料
[常用语句]开头1．D yu have an experience f planting a kind f plants？你有过种植植物的经历吗？2．Let me share yu with the prcess abut my experience f grwing watermeln?让我分享我种植习惯的经历给你。3．I nce lived in the cuntryside and planted sme garlic in the garden.我曾经在乡村住过，在菜园里种过大蒜。
正文1．Check t see if there are any lcal requirements abut digging.检查当地是否有关于挖掘的要求。2．Take a suitable shvel and dig a hle that is 4－5 times the width f the rt ball，mre than enugh s it will fit.用一把合适的铲子挖一个比根球宽4－5倍的洞，足够大。3．Use the garden cultivatr t lsen the dirt all arund the hle t make it easier fr the rts t spread.用园艺耕耘机把洞周围的泥土松掉，使根部更容易散开。
结尾1．Seeing the flwers，I was t excited t express my feelings.看到这些花，我太兴奋了不能表达我的感受。2．I can't wait t shw my grandparents the fruit trees I have planted.我迫不及待地给祖父母看我种的果树。3．N pains，n gains.不劳无获。
典例示范：假如你是李华，请你写一篇短文，描述你种植绿豆(mung)的经历。1．购买种子，种在菜园里；2．几天后，绿豆长出地面；3．又过了几天，长出绿叶；4．给绿豆浇水，长得很好；5．绿豆不断生长，三个月后终于开花结籽。注意：1．词数：80左右；2．可适当增加细节，以使行文连贯。参考词汇：长出地面cme up；长叶子 cme int leaf；洒水 sprinkle water；开花结籽g t seed
【参考范文】Last summer I planted sme mung in my garden.First I bught sme seeds frm a seedman. Then I swed them in the garden. A few days later，I went t the garden and fund the mung were beginning t cme up. Anther few days passed, and the mung were cming int leaf. Nw and then I sprinkled water n them s that they grew well.The mung I planted kept grwing，and finally three mnths later they began t g t seed. I was very happy t see the fruits f my wrk.