1) There are three reasons for this.
2) The reasons for this are as follows.
3) The reason for this is that...
4) We have good reason to believe that...
例如：There are three reasons for the changes that have taken place in our life. Firstly，people’s living standard has been greatly improved. Secondly，most people are well paid， and they can afford what they need or like. Last but not least，more and more people prefer to enjoy modern life.
1) It has the following advantages.
2) It does us a lot of good.
3) It benefits us quite a lot.
4) It is beneficial to us.
5) It is of great benefit to us.
例如：Books are like friends. They can help us know the world better，and they can open our minds and widen our horizons. Therefore，reading extensively is of great benefit to us.
1)It has more disadvantages than advantages.
2)It does us much harm.
3)It is harmful to us.
例如：However，everything divides into two. Television can also be harmful to us. It can do harm to our health and make us lazy if we spend too much time watching television.
1)It is important(necessary，difficult，convenient， possible)for sb.to do sth.
2) We think it necessary to do sth.
3) It plays an important role in our life.
例如：Computers are now being used everywhere，whether in the government，in schools or in business. Soon， computers will be found in every home，too. We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age.
1) We should take some effective measures.
2) We should try our best to overcome(conquer)the difficulties.
3) We should do our utmost in doing sth.
4) We should solve the problems that we are confronted(faced)with.
例如：The housing problem that we are confronted with is becoming more and more serious. Therefore，we must take some effective measures to solve it.
1) Some changes have taken place in the past five years.
2) A great change will certainly be produced in the world’s communications.
3) The computer has brought about many changes in education.
例如：Some changes have taken place in people’s diet in the past five years. The major reasons for these changes are not far to seek. Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable to milk for vitamins.
1) We cannot ignore the fact that...
2) No one can deny the fact that...
3) There is no denying the fact that...
4) This is a phenomenon that many people are interested in.
5)However，that’s not the case.
例如：We cannot ignore the fact that industrialization brings with it the problems of pollution. To solve these problems， we can start by educating the public about the hazards of pollution. The government on its part should also design stricter laws to promote a cleaner environment.
2) I prefer to read rather than watch TV.
3) I prefer reading rather than watching TV.
4) There is a striking contrast between them.
例如：Compared with cars，bicycles have several advantages besides being affordable. Firstly，they do not consume natural resources of petroleum. Secondly，they do not cause the pollution problem. Last but not least，they contribute to people’s health by giving them due physical exercise.
1) It has increased (decreased) from...to...
2) The population in this city has now increased (decreased)to 800，000.
3) The output of July in this factory increased by 15% compared with that of January.
例如：With the improvement of the living standard，the proportion of people’s income spent on food has decreased while that spent on education has increased.
再如：From the graph listed above，it can be seen that student use of computers has increased from an average of less than two hours per week in 1990 to 20 hours in 2000.
1) People have(take)different attitudes towards sth.
2) People have different opinions on this problem.
3) People take different views of(on)the question.
4) Some people believe that...Others argue that...
例如：People have different attitudes towards failure. Some believe that failure leads to success. Every failure they experience translates into a greater chance of success at their renewed endeavor. However， others are easily discouraged by failures and put themselves into the category of losers.
1)In short，it can be said that ...
2) It may be briefly summed up as follows.
3)From what has been mentioned above，we can come to the conclusion that ...
例如：From what has been mentioned above，we can come to the conclusion that examination is necessary，however， its method should be improved.
1. He gave me a very good advice yesterday.
句中的a要去掉，因为advice是不可数名词。一些汉语概念为可数的词在英语中却是不可数的，表示数量时在其前加a piece of，类似的词有：news, bread, work, paper, chalk, furniture, information等等。
2. That girl loves reading book.
3. He went into a book’s shop and bought a dictionary.
一般表示有生命的东西的名词的所有格用’s，如my mother’s car, 而此处适宜用名词修饰名词，改为a book shop.
4. My family is watching TV.
一些集合名词如看成一个整体，则用单数的谓语动词，如My family is a happy one; 如强调集合中每个个体的个人行为，则用复数的谓语动词。此处看电视是个体行为，应把is改为are。类似的词有：team, class, audience等。
5．This has nothing to do with their believes.（这和他们的信仰没关系。）
以f, fe 结尾的词变为复数时一般去f, fe 加ves，如knife—knives, thief—thieves; 而roof 和belief直接加s变为复数。所以应把believes改为beliefs.
6. The boss wants to hire an useful person.
用a还是an，取决于后面单词的第一个音标，如为元音用an，为辅音用a。useful的第一个音是辅音所以应把an改为a。类似的，我们说a European country.
7．Plane is a machine that can fly.
Plane为可数名词单数，不能单独放在句中，应在其前加冠词或把它变为复数，而本句后有a machine, 因此只能在其前面加a，变为A plane。
8．He played a piano at the party yesterday.
把a 改为the ，因为乐器前用定冠词。
9．The machine was invented in 1920s.
在in后加the，因为表示年代用in加the再加几十的复数，如在八十年代in the 80s。
10．Xiao Hong went to school by the bus every day.
11．He is one of those speakers who make his ideas perfectly clear.
12． Whom do you think has left the lights on？
放在疑问句特殊疑问词后的do you think / believe / guess / imagine / suppose等都不参与句子成分，把它们去掉后，疑问词在句中做主语用主格，做宾语用宾格。本句中去掉do you think后缺的是主语，应把Whom改为Who。
13．The boss pretended not to see John and I.
14．These books are mine; those in the bag are her.
15．There are fourteen hundreds students in our school.
Hundred / thousand / million / score/ dozen等词前有具体数字时后不加s，前面没有具体数字时在其后加s 和of，表示大约几百几千的概念。如 two hundred students（两百个学生），hundreds of students（成百上千个学生）。例句中应把hundreds 改为hundred。
16．Their school is twice as larger as our school.
17．Today’s homework is a five-hundred-words composition.
18．Two third of the students in our school are from America.
19．The patient appeared nervously when he talked to the doctor.
20．The artist worked hardly to finish his drawings on time.
此句需要一个副词来修饰，hardly是副词，但意为“几乎不”，hard 也可以是副词，表努力，因此把 hardly 改为hard.
21．This shirt is more cheaper than that one.
22．He works less harder than he used to.
23．The book is fairly more interesting than that one.
fairly只能修饰形容词和副词的原级，可以修饰比较级的副词或短语有：much, even, still, far, a lot, a little, a bit, any, no, by far, rather等，因此把fairly改为rather.
24．This is as an interesting a story as the one in the magazine.
as … as中间的词序是as加上形容词加上a(n)加上名词再加上as，因此应改为as interesting a story as the one.
25．The weather here is nicer than Xizang.
同样的事物才能相比较，weather和Xizang不具有可比性，因此应改为The weather here is nicer than that of Xizang.
26．I would rather take a train than went by bus.
这个词组为would rather do … than do …，因此把went改为go.
27．Is there interesting anything at the meeting?
修饰anything, something, every-thing, nothing的形容词都要放在它们的后面。
28．I never have seen such a person before.
像never之类的副词在句中应放在be动词、助动词之后，实意动词之前。因为应改为I have never seen such a person before.
29．The book is worth to be read.
be worth doing 意为值得被做。因此改为The book is worth reading.
30．It is sure that he will succeed.
31．He is regarded as one of the best alive writers at present.
alive 为表语形容词，偶尔也做后置定语。因此把alive改为living，或把alive 放在writers后面。
32．I don’t know that he has finished the work yet.
yet 用于否定和疑问句，already用于肯定句。把yet 改为already.
33．He said nearly nothing at the meeting.
nearly 不与否定词用在同一个句子中，而almost可以。因此把nearly 改为almost.
34．He usually goes to school by his father’s car.
by加上名词表示一种交通方式，中间什么都不加，如by car, by bus, by plane等；如果名词前有其他的词修饰，则应除by以外的其他介词，此处把by改为in.
35．Please wait me at the school gate.
36．He has been married with Betty for more than twenty years.
37．I finished the work on time under the help of him.
38．He can be at home now because the light in his room is still on.
表特别有把握的肯定判断时用must，表特别有把握的否定判断时用can, can表判断时只用在否定句中。因此把can 改为must。
39．He need come here before the meeting begins.
作情态动词时need用在否定，疑问和条件句中，不能用于肯定句中，而作实意动词时则可以。所以应改为：He needs to come here before the meeting begins.
40．I needn’t come yesterday because all the work had been finished.
由于情态动词本身不体现时态，所以在谈论过去的事情时在情态动词后加 have done，因此在 needn’t 后加have。
41．You hadn’t better stay up too late because you have to get up early tomorrow.
had better 的否定在 better 后面加not.
42．I will tell her about that when she will come tomorrow.
43．The meeting is about to begin in ten minutes.
be about to 一般不与具体的时间状语连用。因此把 in ten minutes 去掉。
44．The boy opened his eyes for a moment, looking at the captain and then died.
45．I have bought this bike for ten years and I am still using it now.
46．I haven’t learnt any English before I came here.
47．The two thieves have been disappeared.
disappear 为不及物动词，因此不能用于被动语态。所以把 been去掉。
48．The building built now will be our teaching building.
49．He is being operated by the famous doctor.
主动语态变为被动语态时，应注意短语动词的完整性，别忘了介词或副词。“给…做手术”应为operate on sb，所以在operated 后加上on。
50．I wonder if the doctor has been sent.
51．The book written by him is sold well.
说一本书畅销是指书本身的属性，因此不用被动语态。本句应改为：The book written by him sells well.
52．This history book is worthy reading.
“值得被做”可以有如下几种说法：be worth doing; be worthy of being done; be worthy to be done. 因此本句应该为：This history book is worthy to be read.
53．We are going to talk about the problem discussing at the last meeting.
54．The girl dressed herself in red is my sister.
55．Being seriously ill, his class-mates sent him to hospital.
分词作状语时，其逻辑主语为这句话的主语，此句应为“因为他病了，他的同学才把他送到医院去”，因此把前半句改为：He being seriously ill.
56．Having not seen her for many years, we could hardly recognize her.
现在分词的否定应把not放在现在分词前面，所以前半句应改为：Not having seen her for many years.
57．I will get somebody repair the recorder for you.
“让某人做某事”可以有以下几种表达法：make sb do sth; have sb do sth; get sb to sth. 因此在repair 前加to。
58．She decided to work harder in order to not fall behind the others.
不定式的否定把not放在to前面。因此应改为：She decided to work harder in order not to fall behind the others.
59．It’s better to laugh than crying.
表比较时比较的双方应为同种结构，或都是名词或都是不定式。因此有两种改法：It’s better to laugh than to cry 或 It’s better laughing than crying.
60．When the teacher came in, he stopped listening to the teacher.
stop doing 为停止做这件事，而stop to do 为停下来正在做的事去做这件事。所以后半句应该为：he stopped to listen to the teacher.