写作是对学生运用英语的综合能力的考查，是最能体现学生英语水平的一种检测方式。学生在写作的过程当中经常暴露一些弱点、犯一些错误。现对学生作文中的常见错误进行简要归纳，粗分类别，并举以实例。
（一）名词
写作中，学生们常把握不好名词的数、所有格以及一些集合名词的用法。
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.
可数名词单数不能孤零零地放在句子里，或前面加冠词，或将其变为复数。此处最好变为books.
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．I bought some potatos and tomatos at the supermarket.
中学阶段以"o"结尾的名词中有四个词变复数时要加es，它们是tomato, potato, Negro, hero; 其余的都加s变为复数。
6．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.
（二）冠词
7．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.
8．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。
9．He played a piano at the party yesterday.
把a 改为the ，因为乐器前用定冠词。
10．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。
11．Xiao Hong went to school by the bus every day.
去掉the，因为表示交通方式用by直接加交通工具。
（三）代词
使用代词时请注意其单、复数，主、宾格以及形容词性物主代词和名词性物主代词的用法。
12．He is one of those speakers who make his ideas perfectly clear.
定语从句的先行词是those speakers，为复数，因此从句中的指示代词应为复数，应把his改为their。
13． 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。
14．The boss pretended not to see John and I.
John和I在句中都做的宾语，应把I 改为me。
15．These books are mine; those in the bag are her.
Her是形容词性物主代词，后面应该加名词books，或把her 改为hers。
（四）数词
16．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。
17．Their school is twice as larger as our school.
表倍数关系的as---as中间只能用形容词或副词的原级。因此把larger改为large.
18．Today's homework is a five-hundred-words composition.
几个单词由连字符连接而组成的复合形容词中的名词只能用单数，所以把five-hundred-words改为five-hundred-word.
19．Two third of the students in our school are from America.
英语表达中分数的分子用基数词，分母用序数词，分子大于一时分母后要加s，所以就把third 改为thirds.
（五）形容词和副词
形容词和副词容易被误用，形容词和副词的比较级和最高级也是应注意的重点。
20．The patient appeared nervously when he talked to the doctor.
appear在此是个系动词，其后应接形容词作表语。所以把nervously改为nervous.
21．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.
22．This shirt is more cheaper than that one.
More只构成比较级，而不能修饰比较级。因此把more去掉。
23．He is the most successful of the two businessmen.
两者相比较时，比较级前用定冠词，三者或三者以上才用most，因此把most改为more.
24．He works less harder than he used to.
表不如… 时用less加上形容词和副词的原级，因此把harder改为hard.
25．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.
26．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.
27．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.
29．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.
30．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。
31．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.
32．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.
33．It is sure that he will succeed.
sure 的主语只能为人，而certain的主语可为人和物。因此把sure改为certain.
34．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。
35．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.
36．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.
（六）介词
37．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.
38．Please wait me at the school gate.
wait为不及物动词，需加介词for后才能再跟名词或代词做宾语。
39．He has been married with Betty for more than twenty years.
marry不跟 with连用，应把with改为to。
40．I finished the work on time under the help of him.
"在…的帮助下"用with而不用under。
（七）情态动词
41．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。
42．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.
43．He used to get up very early in the morning, and now he is still doing so.
used to 用来表示过去常常做某事而现在不了，所以应把后半句改为：but now he is not doing so.
44．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。
45．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.
（八）动词的时态
英语的常用时态有十六种，一般根据上下文和时间状语来确定时态。
46．I will tell her about that when she will come tomorrow.
主句为将来时，其时间、条件、方式和让步状语从句中用一般现在时。因此将will come改为comes。
47．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。
48．The boy opened his eyes for a moment, looking at the captain and then died.
此处look并非伴随状语，而是三个并列的谓语动词，因此把looking 改为looked。
49．I have bought this bike for ten years and I am still using it now.
当句中有for加一段时间作状语时，谓语动词必须为延续性动词，此处把bought改为kept。
50．I haven't learnt any English before I came here.
我来这儿已经是过去的动作，在此之前发生的事应该用过去完成时。
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