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1、辨别one,the one,ones,the ones,one/ones用来代替可数名词,表泛指 I have a bike.Do you have?2.the one/the ones/that/those 表特指 Which one?in the white car.当one和ones被定语修饰，表示特指时，前面用定冠词。Which windows?in the classroom.3.one前面可以加this或that。构成this one和that one，而ones前面不能用these或those，但当ones前面有形容词修饰时，可以用these或those。如：This apple
2、 is red,but that one is yellow。These white coats are mine and those blue ones are his.,one,The one,The ones,one/ones用来代替可数名词,表泛指 the one/the ones/that/those 表特指 that指上文所提到的事 it指上文所提到的物（本身）I have a bike.Do you have?Which one?in the white car.当one和ones被定语修饰，表示特指时，前面用定冠词。Which windows?in the classroom.
3、one前面可以加this或that。构成this one和that one，而ones前面不能用these或those，但当ones前面有形容词修饰时，可以用these或those。如：This apple is red,but that one is yellow。These white coats are Lins and those blue ones are Tonys.,one,The one,The ones,替代词one,ones,that,those,that替换单数可数名词或不可数名词；one只替换单数的可数名词。,Eg:The vase on the left is mor
4、e beautiful than _ on the right.,The coffee produced in Brazil is more famous than _in Mexico.,the one,that,that只用于替换表示事物的名词，而one/ones替换表示人和表示事物的名词皆可。,Eg:His younger sister is taller than the elder _.,I need the plastic bags,not the paper_.,one,ones,that/those一般不带前置定语，但必须有后置定语。one/ones都可。当替换词的后置定语用所
5、有格的of短语或当替换词被所有格修饰时，不用one/ones而用that of/those of.,Eg:I like the vase better than _in another shop.,The windows of your flat are cleaner than_of mine.,A grandparents job is easier than_of a parent.,The computers in our school are connected to the Internet while_in their school arent.,the one/that,tho
6、se,that,those,that/those用于替换有定冠词的名词；one/ones用于替换有不定冠词的名词。,Eg:The style of the building is similar to _of a temple.,A CD player made in Japan costs more than _made in China.,that,one,1.I prefer red roses to white.2.A cake made of wheat is cheaper than made of rice.3.The cost of wheat is less than of
7、rice.4.The houses of the rich are generally larger than of the poor.5.The population of China is much larger than of Japan.6.The students in our class are much cleverer than in their class.7.The pen my father bought for me is cheaper than of my classmates.,ones,one,that,those(=the houses),that(=the
8、population),those(=the students),those(=the pens),.The English spoken in the United States is only slightly different from _spoken in England.A.which B.what C.that D.the one,A scientist who speaks and writes English is in closer touch with the scientist in other countries than _who doesnt.A.one B.th
9、ose C./D.that2.The English spoken in the United States is only slightly different from _spoken in England.A.which B.what C.that D.the one,2)it,this和 that,都可以替代前文已提到的事或情况，细微差别在于it不如其余两者那么强调。,Eg:So she decided to paint the door pink._upset the neighbours a bit.,So she decided to paint the house pink._
10、really upset the neighbours.,It,That,当前面提到的事物不止一件时，it通常指最先提到的事物，而this/that是指最后提到的事物。,Eg:We keep the ice cream machine in the spare room._is mainly used by the children.(指 the machine),We keep the ice cream machine in the spare room._is mainly used by the children.(指the spare room),It,This/That,This可
11、以出现在它所指代的事物之前；而that则指上文所提到的事物。,Eg:Listen to_!We will have three days off.,“A penny saved is a penny earned.”Who said_?,this,that,Eg:I bought a dictionary three years ago and I am still using_ now.I bought a dictionary three years ago but I am going to buy a new _soon.,It用以指特定的前面提到过的事物，即：it和它替换的是同一个事
12、物，it前无修饰语；而one用于替换与前提事物有共同之处但并不完全一样的事物，因此，one之前或之后一定有修饰语来加以区别。,3)It和one,it,one,It引起的几个易混淆的时间句型 It+be+时间+since-clause这个句型表示从since 从句谓语动作发生以后到现在或过去所经过的一段时间，意为“自从.以来已多久了”It is three years since his father passed away.It+be+时间+before-clause 这个句型中的时间一般为表示一段时间的词语(如：a long time,months,weeks,days,hours,minu
13、tes)，主句中的谓语动词用肯定式，意为“过多长时间才.”。主句的谓语动词是否定式时，意为“没过多长时间就.”。主句的时态可用过去时was或将来时will be；用was 时，before从句的动词用一般过去时；用will be 时，before从句常用一般现在时。,她没过多久就背会了那些诗歌。It was _she learned those poems by heart.过了很久警察才来。It was _the police arrived.要过好几个小时他才会作出决定。It _hours before he makes a decision.要不了几个小时我们还会再见面的。_before
14、 meet again.,not long before,long before,will be,It will not be hours,3.It+be+时间+when-clause 这个句型中,it 指时间，而且表示时间的词语前没有介词(时间一般为具体时间)。主句中的谓语动词和从句中的谓语动词在时态上一般是一致的，主句是will be，when从句用一般现在时代替将来时。It was already 8 oclock when we got home.It was the next morning when we finished our work.It will be midnight
15、when they get there.,It+be+时间+that-clause这个句型是个强调句型。例如：It was two years ago that he made animportant invention.(原句是：_)It was at 5 oclock that he practised playing the violin in the morning.(原句是：_)比较：It was 5 oclock when he started in the morning.(5 oclock前没有介词，这是个定语从句),He made an important invention
16、 two years ago.,He practised playing the violin at 5 oclock in the morning.,It+be+time+that-clause这个句型属虚拟语气结构，不管主句中用的是 is 或 was，that从句都须用动词的过去式或should+动词原型(但不及用过去式普通)，在time之前有时可加上high或about 以加强语气。例如：It is time(that)we handed in our exercises.(=It is time that we should hand in ourexercises.)It is hi
17、gh time(that)she wrote a letter to her boyfriend.,It/This/That+the first(second,third)time+that-clause这个句型表示截止到说话时为止的某人的一种经历，关键是注意time前有序数词，主句是 is 时，从句要用现在完成时；如果主句用一般过去时was，则从句须相应地用过去完成时。例如：This is the first time(that)these Europeans _the Great Wall.It was the fifth time(that)I _a friendly visit to
18、Africa.,had paid,have visited,There起始的句型归纳：1）there live/stand/lie/exist,There lay a ditch two metres wide ahead.,2)There come/go/appear/occur/follow用于描述某事的发生或某个动作的开始。,Eg:There will follow a break of 10 minutes and then we will go on with the lecture.,3)There being（独立主格结构）,Eg:There being nothing left
19、 in the fridge,we had to do some shopping first.,4)there to be结构常见于动词intend,mean,consider,hate,want等词后。,Eg:No one would expect there to be a war in his country.,I dont want there to be another accident like this.,结构：It+动词be+强调部分+who(whom)/that+其他部分it可以用来对句子的某一成分加以强调。,It 用于强调句,Eg:Nancy saw your siste
20、r in Tokyo last week.,It was Nancy who saw your sister in Tokyo last week.,It was your sister whom Nancy saw in Tokyo last week.,It was in Tokyo that Nancy saw your sister last week.,It was last week that Nancy saw your sister in Tokyo.,有些否定句也可以改成这种强调结构：,It wasnt until last summer that I heard from
21、her.,I didnt do all this for myself.,It wasnt for myself that I did all this.,问句也可变成这种结构：,Who called him“comrade”?,Who was it that called him“comrade”?,How did you forget to lock the door?How was it that you forgot to lock the door?,Ex:把下列句子改为强调句：1.Tom broke the window last night.2.They want money.3
22、.Peter saw his friend in the park yesterday.4.I didnt have an opportunity of seeing her again for several years.5.Why does everyone think Im narrow-minded?6.I didnt receive my letter until yesterday?7.Did Dick call the meeting last week?8.Did it happen in 1980?,Toms mother kept telling him that he s
23、hould work harder,but _ didnt help.A.he B.which C.she D.it As _ happens,I have brought my umbrella with me.A.it B.this C.that D.such 3._has already been pointed out,grammar is not a set of dead rules.A.As B.It C.That D.This4.It was seven forty-five _he finished the work.A.when B.that C.when D.before
24、,D,A,A,A,5.Was it because it snowed last night _ he didnt come?A.why B.that C.when D.which 6.Does _ matter if he cant finish the job on time?A.this B.that C.he D.it 7.European football is played in 80 countries,making _ the most popular sport in the world.which B.this C.that D.it 8._ is no doubt that he will succeed in his experiment.A.It B.This C.That D.There,B,D,D,D,9.It worried a bit _ her hair was turning gray.A.while B.that C.if D.for 10.It was not _ she took off her dark glasses I realized she was a famous film star.A.when;that B.until;that C.until;when D.when;then,B,B,
