题文

I often _____________ books at the weekends, but last weekend I _____________.

[     ]

A. reads, did B. reading, didn't C. read, didn't

题型：单选题  难度：偏易

答案

C

据专家权威分析，试题“I often _____________books at the weekends, but last weekend..”主要考查你对  一般现在时，动词单数第三人称，否定句  等考点的理解。关于这些考点的“档案”如下：

一般现在时，动词单数第三人称否定句

考点名称：一般现在时，动词单数第三人称

• 一般现在时：
  表示现在经常反复发生的动作、存在的状态或习惯性的动作的时态。可概括为
  ①经常性或习惯性动作；
  ②长期存在的特征或状态；
  ③普遍真理、客观事实等。
  构成：
  一般现在时用行为动词的原形，但第三人称单数作主语时，动词的词尾要加-S。
  a. 表示经常性或习惯性的动作。 
  例：Li Ming always helps the old man. 李明一直帮助这位老人。 
  We usually go to school on foot. 我们通常步行上学。 
  They sometimes go fishing on Sundays. 他们有时周日去钓鱼。
  b. 表示永恒不变的事实或真理。 
  例：A bird flies with wings. 鸟用翅膀飞翔。
  c. 用在格言、谚语中。 
  例：Pride goes before a fall. 骄者必败。

•  

• 一般现在时具体用法:
  1.表示经常的或习惯性的动作，常与表示频率的时间状语连用。
  时间状语：
  always，usually，every morning/night/evening/day/week/year，often，sometimes，
  occasionally，from time to time，twice a week，rarely,seldom，once a month，hardly，ever,never.
  e.g： I leave home for school at 7:00 every morning.
  
  2.表示主语具备的性格、能力、特征和状态。
  e.g：I don't want so much.
  Ann Wang writes good English but does not speak well.
  比较：Now I put the sugar in the cup.
  I am doing my homework now.
  
  3.表示客观事实和普遍真理。
  e.g ：The earth moves around the sun.
  Shanghai lives in the east of China.
  
  4.在时间状语从句和条件状语从句中，常用一般现在时代替将来时。
  
  5.表示预先计划或安排好的行为。
  
  6.小说故事用一般现在时代替一般过去时。新闻报道类的内容，为了体现其“新鲜”性，也用一般现在时来表示过去发生的事情。
  
  7.有些表示状态和感觉的动词表示现在发生的具体行为时，只用一般现在时，而不用进行时态。
  
  8.表示现在发生的具体动作或存在的状态
  
  9表示格言或警句中。　e.g Pride goes before a fall.　骄者必败。
  注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。
  例：Columbus proved that the earth is round..
  第一句用一般现在时，用于操作演示或指导说明的示范性动作，表示言行的瞬间动作。
  再如：Now watch me,I switch on the current and stand back.
  第二句中的now是进行时的标志，表示正在进行的动作的客观状况，所以后句用一般现在时。

• 一般现在时用法表:
   

  第三人称单数的构成见下表：
  

  词	构成	举例
  一般情况	词尾+s	动词原形	第三人称单数
  		work(工作) stop(停止)	works stops
  以-ch, -sh, s, x, o结尾	词尾+es	teach(教) wash(洗) dress(装扮) fix(安装) go(去)	teaches washes dresses fixes goes
  以“辅音字母+y”结尾	变y为i，再加es	fly(飞翔) try(尝试)	flies tries

  不规则变化have和be动词 变have为has 变be为am,is,are例: have-has; be-am,is,are
  

• 一般现在时的特殊用法:
  一些动词可用一般现在时来表达现在进行时：
  verbs of the senses: hear,see,taste,smell，feel
  verbs of the thinking: believe,know,mean,realize,think,remember
  verbs of the linking: dislike,fear,heat,like,love,want
  verbs of the possession: belong,have,own,possess

考点名称：否定句

• 否定句：
  表示否定的句子。必须有否定词。
  否定句的构成形式：
  a. 谓语为be动词时，“be+not "一名学生。
  b. 谓语为实义动词而且没有情态动词和助动词时，“do/ does/ did+not"构成否定。 
  例：I do not like dancing. 我不喜欢跳舞。 
        He does not want to go to school. 他不想去上学。
  c. 谓语为“情态动词+实义动词”时，“情态动词+not”构成否定。 
  例：You must not smoke. 你千万不要吸烟。 
         I can not catch it. 我抓不住它。

• 否定句在英语语法中可以分为九类：
  （1）一般否定句
  I don't know this. No news is good news.
  There is no person（smoking）/not a person/not any person（smoking）in the house.
  （2）特指否定
  He went to his office, not to see him.
  I am sorry for not coming on time.
  I don't think/believe/suppose/feel/imagine you are right.
  （3）部分否定
  All the answers are not right
  All is not gold that glitters
  I don't know all of them.
  I can't see everybody/everything.
  Both of them are not right.
  （4）全体否定
  None of my friends smoke.
  I can see nothing/nobody.
  Neither of them is right.
  Nothing can be so simple as this.
  （5）延续否定
  You didn't see him, neither/nor did I.
  You don't know, I don't know either.
  He doesn't know English, let alone/to say nothing of/not to speak of（更不用说）French.
  （6）半否定句
  We seldom/hardly/scarcely/barely hear such fine singing.
  I know little English. I saw few people.
  （7）双重否定
  You can't make something out of nothing.
  What's done cannot be undone.
  There is no sweet without sweat.
  No gain without pains.
  I can't help /keep/ laughing whenever I hear it.
  No man is so old but（that）he can learn.
  （8）排除否定
  Everyone is ready except you.