广州版英语七年级上册第三单元知识点

Unit3 The Earth一、教学衔接二、教学内容知识点一、名 词表示某一事物，有具体的和抽象的之分。分为可数名词和不可数名词。强调：不可数名词都默认为单数，所以总是用is或者was；最好不要根据some、any、a lot of等词去作判断，以免受误导。1、可数名词如何变“复数形式”：a一般情况下，直接加-s，如：book-books, bag-bags, cat-cats, bed-beds ；读音：清辅音后读s，浊辅音和元音后读z。b以s. x. sh. ch结尾，加-es，如：bus-buses, box-boxes, brush-brushes, watch-watches ；读音：iz。c以“辅音字母+y”结尾，变y为i, 再加-es，如：family-families, strawberry-strawberries ；读音：z。d以“f或fe”结尾，变f或fe为v, 再加-es，如：knife-knives ，thief-thieves；读音：z。e以“o”结尾的词，一般直接加s，mango除外：mango-mangoes；读音：z。f不规则名词复数： man-men, woman-women, policeman-policemen, policewoman-policewomen, snowman-snowmen, mouse-mice, child-children, foot-feet, tooth-teeth, fish-fish, people-people, Chinese-Chinese, Japanese-Japanese 2、不可数名词没有复数。如果要计算不可数名词所表达的数量，就得在数词和不可数名词之间加上“量词+of”。例如：a glass of water, a piece of paper, a bottle of juice判断步骤： 如是am、is或was原形读句子读该单词认识该单词理解意思看be动词 如是are或were加s或es练一练：1、写出下列各词的复数。 I _ him _ this _ her _ watch _ mango_child _ photo _ diary _ day_ foot_ dress _ tooth_ sheep _ box_ strawberry _ thief _ engineer_ peach_ sandwich _ man_ woman_ leaf_ people_ 2、用所给名词的正确形式填空。（1）Are there two ( box ) on the table?（2）I can see some ( people ) in the cinema.（3）How many ( day ) are there in a week?（4）Herere five ( bottle ) of ( juice ) for you.（5）This ( violin ) is hers. Those ( grape ) are over there.知识点二、经典句记忆1.There are different animals on Earth too. 地球上还有不同的动物。2. The Earth provides us with air, water and food. 地球为我们提供了空气、水和食物。3. We must stop doing these things. 我们必须停止做这些事情。4.There are different for us to protect the Earth for our future.对我们来说，为了我们的未来保护地球是很重要的。5.We need air to breathe. 我们需要空气来呼吸。6.We need air to survive. 我们需要空气来生存。7. And when we breathe it, it keeps us alive. 当我们呼吸时，空气让我们充满活力。知识点三、一般现在时的功能及句式结构功能：a)表示事物或人物的特征、状态。eg. The sky is blue.b)表示经常性或习惯性的动作。eg. I get up at six every day.c)表示客观现实。eg. The earth goes around the sun.标志词:often, usually, always, sometimes, seldom, never, every day, on Mondays, at 8:00句子结构因动词为be动词或实义动词略有不同，结构分别如下：（1）be动词（am/is/are）a)肯定句：主语+ be +其他b)否定句：主语+ be +not+其他c)一般疑问句：be+主语+其他d)肯定回答：Yes,主语+ be e)否定回答：No,主语+ be +not（2）实义动词a)肯定句：主语+动词一般现在时+其他b)否定句：主语+do/does+not+动词原形+其他c)一般疑问句：Do/Does+主语+动词原形+其他d)肯定回答：Yes,主语+ do/doese) 否定回答：No,主语+do/does+not3、用动词的正确形式填空解题方法：先看标志词，确定时态；看人称，填写谓语部分。a)Mike sometimes _(go) to the park with his sister.首先句子里面有标志词sometimes，我们可以确定这个句子是一般现在时，句子主语是Mike，它是第三人称单数，所以正确答案是 goes。b)We _ (not watch) TV on Mondays.首先句子里面有标志词on Monday，我们可以确定这个句子是一般现在时，句子主语是we，它是第一人称复数，所以正确答案是dont watch。4、行为动词第三人称单数的变化规则一般现在时句子中，只有主语为第三人称单数时动词才有词形变化，主语为其他人称时动词均用原形，变化规则如下：a)一般情况下，在动词后直接加s。 eg. playplayslikelikes b)以s，x，sh，ch，o结尾的动词加es。 eg. gogoeswashwashes, mixmixes, guessguessesc) 以辅音字母加y结尾的动词，把y改i再加es。eg. flyfliesstudystudies, trytries5、ExerciseA写出下列动词的第三人称单数。drink_ go_ stay_ make_ look_ pass_ carry_ come_ watch_ plant_ fly_ study_ brush_ do_ teach_B用所给单词的适当形式填空。1. He often _(have) dinner at home.2. Daniel and Tommy _(be) in Class One.3. We _(not watch) TV on Monday.4. Nick _(not go) to the zoo on Sunday.5. _ they _(like) the World Cup?C按照要求改写句子。1.Daniel watches TV every evening.(改为否定句) _2.I do my homework every day.(改为一般疑问句，作否定回答) _3.She likes milk.(改为一般疑问句，作肯定回答) _4.Amy likes playing computer games.(改为一般疑问句，作否定回答) _5.We go to school every morning.(改为否定句) _三、教学练习找出下列各组单词中划线部分的发音与其他不同的单词。( )1. A. close B. hobby C. problem D. not( )2. A. part B. grammar C. market D. large( )3. A. report B. important C. horse D. junior ( )4. A. catch B. complete C. country D. practice( )5. A. energy B. Germany C. ground D. engineer选择适当的词填空。1. -Whats on the table? -There _ (is/ are) two glasses of milk on it.2.All the juice _ (is/ are) in the bottle.3.There _ (is/ are) _ (a/ some) bread in the fridge.4.-How _ (many/ much) cups of tea would you like? -I would like three.5. The restaurant is good. Look, there are so many _ (food/ people) in it.单项选择。1. He wants to write down something, so he asks me for _. A. a paper B. some papers C. a piece of paper D. some pieces of papers2. They want to have some _ for supper, so they decide to catch _ now. A. fishes; much B. fish; many C. fish; much D. fishes; many3. There _ many kinds of animals living _ Earth. A. are; on B. is; in C. are; at D. is; by 4. _ of the students in our class are big football fans. A. One quarters B. Three quarters C. Three quarter D. One of quarter5. -What do you think of our city? -It is getting _. A. cleaner and cleaner B. clean and cleaner C. clean and clean D. cleanest and cleanest6.When the traffic light is red, cars _ stop. A. can B. need C. may D. must7.Mother puts the apples in the fridge to _. A. keep fresh them B. keep them fresh C. keeping them fresh D. keeping fresh them8. Mrs. Smith asked her son _ too much ice cream. A. to not eat B. dont eat C. not to eat D. dont to eat 9. When Miss Li walks into the classroom, the students _ and keep quiet. A. stop to talk B. stop not talk C. stop talk D. stop talking 10. -What is he doing? -He is writing a report on _ water clean.A. to make B. made C. making D. makes 语法选择。 In spring, big sand storms often happen in the north. Deserts(沙漠) are growing bigger and bigger. Scientists _ to turn deserts into good land again. The best way is to bring water to deserts and scientists do their best to work out the water problem. So people _ live and grow food there. However, land _ deserts. Scientists may not be able to change deserts in time. Why does land become deserts? Scientists think that people are doing bad things to the Earth. Some places on Earth dont get _ rain. But they still do not become deserts. This is because there _ grass and some green plants growing there. _ are very important to dry places. Plants do not let _ sun make the land even _. Plants do not let the wind blow the soil(泥土) away. When rain _, plants hold the water. Without (没有) plants, the land can become desert very _.( )1A. tries B. tried C. trying D. are trying ( )2.A. must B. could C. can D. would ( )3.A. become B. is becoming C. became D. to become( )4.A. much B. many C. more D. few( )5.A. are B. were C. is D. was ( )6.A.We B. They C. You D. It ( )7.A. the B. an C. a D./( )8.A. the driest B. driest C. dry D. drier( )9.A. falls B. fell C. falling D. to fall ( )10.A. easy B. easier C. easiest D. easily四、教学总结这节课主要学习unit3 the earth，学习运用名词与一般现在时，这两个知识点在考试中也是必考的内容，所以要求掌握并能灵活运用。五、作业布置用括号内动词的适当形式填空。1. He often _(have) dinner at home.2. Daniel and Tommy _(be) in Class One.3. We _(not watch) TV on Monday.4. Nick _(not go) to the zoo on Sunday.5. _ they _(like) the World Cup?6. What _they often _(do) on Saturdays?7. _ your parents _(read) newspapers every day?8. The girl _(teach) us English on Sundays.9. She and I _(take) a walk together every evening.10. There _(be) some water in the bottle.11. Mike _(like) cooking.12. They _(have) the same hobby.13. My aunt _(look) after her baby carefully.14. You always _(do) your