暑假预习:初中英语8年级上册unit8 语法专项---祈使句、(不)可数名词等(含习题)
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unit8 语法专项---祈使句、(不)可数名词等(含习题)祈使句概念:表示命令、请求、警告、禁止、建议或劝告等,主语(you)通常被省略,句首谓语动词用原形,句末用感叹号或句号,读降调。
回答祈使句时要用一般将来时。
结构和用法:(1)肯定的祈使句①句型:以动词原形开头(省略主语)。
Come in! 进来!Be quiet!安静!Let's go shopping!让我们去购物吧!②有时为了加强语气,可以在动词之前加上do,表示“务必,一定”。
Do come on time!一定要准时来!(2)否定的祈使句型①Don’t+动词原形Don't be late.不要迟到。
②Let +sb+not+动词原形Let's not speak loudly.我们不要大声说话注意:(1)有时为了表示委婉的语气,可在句首或句尾加上please,但please加在句尾时,前面要用逗号隔开。
Please sit down. 请坐!Stand up, please.请起立。
(2)在意思较为明显的情況下,可把谓语动词省去。
This way, please.请这边走。
(3)有时为了明确地向对方提出请求或发出命令,可加称呼,但称呼要与句子隔开。
Turn off the light, Jim. 吉姆,关灯!(4)某些名词、形容词或副词等后面加感叹号,也可作为祈使句使用。
Hands up! 请举手!Hands down! 放下手!Taxi! 出租车!(5)有些可用no开头,用来表示禁止性的祈使句。
No smoking! 禁止吸烟!No parking!禁止停车!No fishing!禁止钓鱼!No photos.禁止拍照!可数名词&不可数名词从名词所表示的事物的性质来看,名词分为可数名词和不可数名词两类。
概念:可数名词:表示能够计算的人或物的名称,通常有单数和复数形式。
可数名词的单数一般在名词前加冠词a/an或基数词one来表示,如a cup,an egg, one student不可数名词: 是指不能以数目来计算,不可以分成个体的概念、状态、品质、感情或表示物质材料的东西。
不可数名词没有单复数形式,前面不能用不定冠词a/an,但可以用定冠词the。
修饰词:1).可数名词的数量除了用冠词a,an和基数词表示外,还可用下面的词表示:many“许多”,如:许多苹果many applesa few “几个”,如:几个学生a few studentsfew“很少”,如:很少的人few people2).不可数名词可用下面的词表示数量:much“许多”,如:大量的雨much raina little"一点儿”,如:一点儿水a little waterlittle“很少”,如:ー丁点儿肉llittle meat3).既可修饰可数名词又可修饰不可数名词的词有:lots of= a lot of “许多,大量”; some “一些(用于肯定句)”常见不可数名词归类:1.表示液体: water,juice,milk,coffee,coke,ink2.表示自然现象:snow,rain,wind3.表示食品: bread,meat,rice,jam,honey,beef,pork,chicken,fish(鱼肉),tofu,food...4. 其他: paper, news, homework, advice, information, progress,...不可数名词量的表达:eg1:We need one cup of yogurt.我们需要一杯酸奶。
(选自人教版教材unit8)one cup of yogurt意为“一杯酸奶”。
“基数词/不定冠词+表示计量单位的名词+of”可以用来表示数量,修饰不可数名词或可数名词复数。
a cup of tea一杯茶three bags of salt三袋盐five baskets of flowers五篮子花ten bottles of water十瓶水eg2:First,put some butter on a piece of bread.首先,在一片面包上放一些黄油。
(选自人教版教材unit8)a piece of,意为“一片;一块”。
a piece of的还有其他含义:一条/首/张a piece of后接不可数名词,表示数量;如果表示的数量超过一个,则piece用复数形式。
a piece of短语作主语时,谓语动词用单数形式;而...pieces of短语作主语时,谓语动词用复数形式。
There is a piece of bread on the plate.盘子里有一片面包。
There are two pieces of bread on the plate.盘子里有两片面包。
拓展:how many&how much都用来对“数量”进行提问,意为”多少”。
how many:主要用来对可数名词的数量进行提问,后接可数名词复数形式;一年有多少个星期? ----How many weeks are there in a year?有五十二个。
----There are fifty two.how much:主要用来对不可数名词的量进行提问,后接不可数名词。
另外,how much还可以直接用于询问价格。
杯子里有多少牛奶?---How much milk is there in the glass?只有一点儿。
--- There is only a little.你的背包多少钱?---How much is your backpack?三十元。
---It's thirty yuan.练习题:1.I don’t know what to do. Can you give me______?A a adviceB an adviceC some adviceD any advices2.Could you please get me some______? I'm hungry.A appleB waterC breadD egg3.We need two apples and three________.A orangeB tomatoesC breadD carrot4.--- There is______meat in the fridge. Let's go and buy some.---OK! Mom.A littleB a littleC fewD afew5.---_______yogurt do we need?---About a cup.A How muchB How manyC How farD How old6.---_______tomato juice do you need?---One cup is enough.A How oftenB How manyC How much7.I like vegetables, but I don' t like______.A vegetables saladB vegetable saladsC vegetable saladD vegetables salads8.--- Do you like_____?----Yes. They are healthy.A.ice-cream B meat C carrots D chicken9.Let’s ask Mr. Wang for_____about the earthquake.A an informatlonB informationsC some informationD any information10.---Tom,don’t make______noise while______.---Sorry, Mum.A too many; eatingB too much; eatingC too many, to eatD too much: to eat11.The two books are not the same. There are many_______between them.A lessonsB languagesC differencesD tasks12.______sleep in class!A NoB NotC Don’t13._______me an email before you come to Hangzhou. I'll meet you at the airport.A Sending B. To send C. Sends D Send14.Tommy,___ play basketball in the street next time. You may get hit by a car.A. doB. don'tC. mustD. mustn’t15.---Mum,I’m not full. May I have two_______? ---Certainly. But don't eat too many.A orange B. chickens C eggs D. bread16. A: Can I help you,madam? B: I want_____________.A two boxes of appleB two glass of waterC two bowls of porridge17.______ your umbrella, or you'll catch a cold on such a rainy day.A. Take B To take C Taking D. Takes18._______ wake up your sister, Ben. She needs a good sleep.A. Don’tB. Doesn'tC. Aren’tD. Can't19. We should take our teachers’______ and make full use of_____ to studyA. advices; timesB. advice: timeC. advice; timesD. advices; time20. ---How much____ the pair of shoes? ---Twenty dollars______ enough.A. is: isB. is: are C, are: is D. are: are答案:1-5CCBAA6-10CCCCB11-15CCDBC16-20CAABA。