八年级下册英语第八单元课件
张一凡
表示提建议的句子
Why don't you…?=Why not…?你为什么不……呢?如: Why don't you /Why not get a computer?你为什么不买台电脑呢? How about…?=What about…?……如何?……怎么样?后面跟sth.或 doing sth.。如:
How about /What about a dress?一条裙子怎么样? How about /What about playing tennis?打网球怎么 提出一种可能性,询问对方意见。 词语辨析
1.instead与instead of
(1)作为副词,instead的含意是“代替,顶替”,表示前面的事情没做,而是做了后面的事。如: He wanted to be a great singer, but he became a doctor instead.他想当名歌唱家,但他却成了一名医生。 (2)instead of是介词词组,后接一个并列成分,可能是名词、代词、介词短语、副词等。接动词时,应该用-ing形式。instead of短语具有否定意义,后面跟没有做的事情。如:
He answered this question instead of that.他没回答那个问题,而是回答了这个问题。 2.a number of与the number of
(1)a number of意为“大量的”、“许多的”,后接复数名词,作主语时谓语动词用复数形式。如: A number of books were stolen from the library.图书馆遗失了很多书。
(2)the number of意为“……的数量”,作主语时谓语动词总是用单数形式。如:
The number of students in our school is about two thousand.我们学校的学生人数大约是两千。 3.too much与much too
too much的中心词是much,too修饰much,以加强语气。too much修饰不可数名词或单独使用,意为“more than enough”,与too many相对,后者修饰可数名词或单独使用。如:
Don't eat too much sugar, it's not good for your health.别吃太多的糖,那会影响你的健康。 much too的中心词为too,much修饰too,以加强语气,too用在形容词或副词之前。如: My uncle is a businessman. He is always much too busy.我的叔叔是个商人,他一直很忙。 例句解析
1.What should I get my mom for her birthday?我应该为我妈妈的生日买点什么礼物呢?
(1)句中should为情态动词,意为“应该”、“应当”,其后接动词原形,用于各种人称和数。如: You should finish your work first.你应该先完成工作。 2.-How about a scarf? / -No, that's too boring.
(1)How about意思是“……怎么样”,具体含义要紧扣上文去理解。也可以说What about。值得注意的是about是介词,所以其后只能接名词、代词、动名词等具有名词性质的词。如: -When shall we meet tomorrow? -How about 8∶00?八点钟怎么样? 3.What's the best gift Joe has ever received?乔曾经得到的最好的礼物是什么?
句子中Joe has ever received是一个定语从句,修饰the best gift。该从句用现在完成时,表示“到目前为止乔得到过的(礼物)”。如:
This is the most boring film I've ever seen.这是我曾经看过的最乏味的一部电影。 4.Dogs are too difficult to take care of.狗太难照料了。
(1)too+形容词或副词+to+动词原形,意为“太……而不能……”。如: You speak too fast to be followed.你讲话太快了,以致让人跟不上(听不懂)。
(2)take care of意为“照顾,照料”,与look after意思相当。表示“照顾好”则说take good care of。如: Please take good care of your sister.请照看好你妹妹。
5.enough作名词时,表示“足够的人或物”,用宋代替可数名词或不可数名词;enough用形容词时,表示“足够的”,修饰名词作定语,放在名词前后均可;enough作副词修饰形容词、副词等时,放在它所修饰的词的后面。常用的句型是;形容词/副词+enough to do sth.意思是“足够??于某事”。 My brother is old enough to go to work on farm. My sister is too young to go to school
6.However,life with a pig isn’t always perfect.不管怎样和猪一起生活总不是完美的。
▲however这是一个合成词,“无论如何”,“不管怎样”,仍是一个副词,用来强调句子的语气。一般用做插入语,放在句首。如:
However,I must go back today.我今天无论如何要回去。 However hard he tried,he didn’t catch up with the bus. 无论他怎样努力,他还是没能赶上车。
Whenever you come,we will welcome you.无论你什么时候来,我们都欢迎你。 无论我们来自何方,我们都应该成为好朋友。
7.Now she’s too big to sleep in the home?现在她太大了,不能睡在这个房子里了?? 辨析:too?to?与enough to? (1)too?to?太??而不能??
当“某人”作主语时,“太??而不能??”,若“某物”作主语时,则变为too?(for sb.)to?“(某物)对某人来说太??而不能??”。 I am too tired to walk on.。
That question is too difficult for Jim to answer.
(2)enough to?“足够?,自己做??”。此时句子的主语,同样是“某人/物”。
Ben is old enough to go to school
David is strong enough to lift the big stone.
① 此时enough为副词,修饰形容词或副词时,需放在被修饰词的后面。
②表示前提“不够??时”可以用“not+adj./ad v. enough to”表示,此时可将其中的形容词或副词替换为反义词,再用too?to句式表达,而句意不变。如上述最后两个例子,可以改写为: The room is too small for us to live in Peter left too late to get there on time.
8.辨析:some time,some times,sometime与sometimes
①some time一些(点)时间。此时time为不可数名词“时间”。 Don’t worry,there is some time.(一般用a little time) 不要着急,还有些时间。
It took him some time to mend his bike last night 昨天晚上修自行车花了他一些时间。
②some times几次,几倍。这儿time为可数名词“次”,“倍”。 I have been to the Great Wall some(several)times.我去过长城几次。 The number of the students in our school is some times over that in theirs. 我们学校的学生数是他们学校的几倍。 ③sometime adv.(将来)某个时候。
I believe they will come sometime.我相信他们不定什么时候能来。
We will go to plant trees sometime next week我们下周某个时候要去植树。 ④sometimes adv.有时候,多用于一般现在时。 My father sometimes comes back from work very late. 我爸爸有时候下班很晚。
Sometimes I go to the park by myself.有时我会自己去公园 9.fell为动词fall的过去式。fall asleep意为“睡着、小睡”。 例如:I fell asleep while watching TV.我在看电视时睡着了。
asleep形容词。意为“睡着的”,以a-起首的形容词在句中只能作表语,不能放在名词前作定语。 例如:Is he sleeping? 他正在睡觉吗? Yes, he is asleep.是的,他睡着了。
The baby is asleep in the bed.婴儿在床上睡觉了。 sleeping呵作为“睡眠中的”,用在名词前作定语。
例如:a sleeping dog.一只熟睡的狗。
10.Have you ever been to an amusement park?你曾去过娱乐圈吗?
Have you ever been to…?意为“你曾去过……吗?”,其中have been to属现在完成时的一种用法。ever用于疑问句中,表示“曾经”,常与现在完成时连用。如: Have you ever been to Wuhan?你曾到过武汉吗?
Have you ever spoken to a foreigner?你曾和外国人谈过话吗?
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