如何将一般现在时的肯定句改成否定句。 
不含有“be”动词的一般现在时的肯定句,在改成否定句时,首先要想到助动词“do”或“does”,构成“do not / don’t ”或“does not / doesn’t ”否定结构, 其中“does”只能用在主语是第三人称单数时,还要记得把动词的第三人称形式改为原形;“do”用在主语不是第三人称单数时。 
例如:1、He writes the new words every evening.  ( 肯定句 ) 
        He doesn’t write the new words every evening.  ( 否定句 ) 
 
   2、We go to school on Sundays.           ( 肯定句 ) 
     We don’t go to school on Sundays.       ( 否定句 ) 
 
   3、Xiao Li reads newspaper every day.      ( 肯定句 ) 
     Xiao Li doesn’t read newspaper every day.  ( 否定句 ) 
 
   4、The blue bird sings every morning.        ( 肯定句 ) 
     The blue bird doesn’t sing every morning.   ( 否定句 ) 
 
一般现在时的肯定句改成否定句练习(按要求改写下列句子): 
     1、They dance every evening. ( 改成否定句 ) 
  
          2、It is a monkey.   ( 改成否定句 ) 
 
     3、A cat eats five times in a day. ( 改成否定句 ) 
 
     4、She watches TV from Monday to Friday. ( 改成否定句 ) 
 
          5、 We take a bus to go to school every day.  ( 改成否定句 ) 
 
          6、 I like dogs. ( 改成否定句 ) 
 
          7、 He is a policeman. ( 改成一般疑问句 ) 
  
          8、 It has four legs.  ( 改成否定句 ) 
 
          9、 He can sing some kinds of songs.  ( 改成否定句 ) 
 
         10、 You look like your father.    ( 改成否定句 ) 
 
 
 
 
阶段综合练习 
一、        用所给词的适当形式填空。 
1.        He ________ ( be ) a good student in the school.  
2.        They are good ________ ( friend ).  
3.        It ______ ( look ) like a dog.  
4.        We ______ ( have ) a good Chinese teacher, Miss Xu. 
5.        There are _______ ( 4 ) tall boys under the big tree. 
6.        They _______ ( be ) nice girls. 
7.        I _____ ( go ) home by bike every day. 
8.        He ______ ( do ) his homework every evening. 
9.        How _____ ( be ) you? 
10.        I _______ ( be ) fine, thank you. 
二、        按要求改写下列句子。 
1、        He is a short man. ( 改成否定句 ) 
 
2、        We are good friends. ( 改成一般疑问句 ) 
 
3、        She can sing.  ( 改成否定句 ) 
 
4、        My name is Wu Dong. ( 对画线部分提问 ) 
 
5、        The tall woman dances in the room every evening. ( 改成否定句 ) 
 
6、        It is a red apple. ( 对画线部分提问 ) 
 
7、        They do their homework every day. (改成否定句 ) 
 
8、        The new dress is yellow. ( 对画线部分提问 ) 
 
9、        We have three meals every day. ( 改成否定句 ) 
 
10、        My father is 42. ( 对画线部分提问 ) 
 
11、        It runs ten minutes every morning. ( 改成否定句 ) 
 
12、        There are four pears in the basket. ( 对画线部分提问 ) 
 
13、        My pencil-box is black. ( 改成一般疑问句 ) 
 
14、        He has a nice T-shirt. ( 改成否定句 ) |