单数句变复数句

     单数句变复数句歌谣：

                                      单数句变复数句,   代词四变要记住。
                                            人称,指示,反身变 物主代词看一看。
                                            连系动词 am  is   变成 are。
                                            冠词a an要去掉，改为some,any也可以。
                                            名词做定语，介宾不要变；有man和woman也例外。
                                            句式不要变，十全十美题做完。
      1人称代词由单数变复数：

           例1 She is a girl . They are girls .

           例2 I like her. We like them.

2 指示代词由单数变复数：

         例1 This is a book .     These are（some）books .

         例2 Is that a pen？      Are those（any）pens？
       3  反身代词：
　                       第一人称    myself              ourselves
　     　              第二人称    yourself           yourselves
　　                   第三人称    himself            themselves
　　                                   ( herself, itself )

            例1 I am teaching myself computer.  

                    We are teaching ourself computer.
　　  例2 The child himself draws this picture.  

                   The children themselves  draw  these pictures.
　　    4 物主代词由单数变复数：

                 1 名词性物主代词：mine ours ，yours yours ， his/hers/its theirs

                  2 形容词性物主代词：my  our，your your ，his/her/its their

                        例1 The book is mine. The books are ours.

                        例2 This is her pen. These are their pens.
    5 一般情况下，形容词性物主代词在单数句变复数句时不变。

                       例1 This is my book .     These are my books .

    6 当句中形容词性物主代词与句中的主语一致时，形容词性物主代词

        应随主语人称的变化而变化，  仍要保持一致。

                       例1 He likes his bike.  They like their bikes.

     7 连系动词由单数变复数 ：is/am  are

                      例1 I am a teacher. We are（some）  teachers.

    8  a/an表示一个，只能用在单数名词前，当单数句变复数句时，

           一定要把a/an去掉，或改为some/any。

                       例1 This is a book .     These are（some）books .

                       例2 Is that a pen？      Are those（any）pens？

   9 当名词作定语或在介词短语中作介词宾语充当除宾语以外的

       其它成分时，  该名词不变。

          例1 He is a boy student .They are（some）boy students.

                          （man和woman）除外。

                      例2 She is a woman worker.

                            They are（some）women workers.

      10 单数句变为复数句时，句式不能改变，即单数句是疑问句时，

          变为复数句时，仍然是疑问句。

                   例1 What’s this？  What are these？

                  例2 She likes his bike.  They like their bikes.

 可数名词的复数形式的部分规则

      1  一般情况加s，结尾是清辅音读[s]，结尾是浊辅音或元音读[z]。

            例：friend→friends; cat→cats; style→styles; sport→sports;

                 piece→pieces

      2  以s、x、ch、sh结尾的词，在该词末尾加上后辍-es构成复数。

           读[iz]。

          例：bus→buses; quiz→quizzes; fox→foxes;

                match→matches;  flash→flashes

    3  以辅音字母+y结尾的名词，将y改变为i，再加-es。          读[z]。

         例：candy→candies; daisy→daisies; fairy→fairies;

              lady→ladies; story→stories

   4  以-o结尾的名词，有生命的加-es，无生命的加-s构成复数。        读[z]。

           例：tomato→tomatoes; potato→potatoes;

                  torpedo→torpedoes;bingo→bingoes （有生命）

           例：silo→silos; piano→pianos;

                  photo→photos; macro→macros（无生命）

   5  以-f或-fe结尾的名词，多为将-f或-fe改变为-ves，但有例外。

          读音变化：尾音[f]改读[vz]。

           例：knife→knives; life→lives; leaf→leaves; staff→staves;

                 scarf→scarves 反例：roof→roofs

   6  以-ce se ze（d）ge等结尾的名词，加-s，读[z]。

             例price—prices  case—cases  orange—oranges

            名词的不规则变化：

        man→men; woman→women; child→children; people→people;

        fish→fish; sheep→sheep; deer→deer; foot→feet;

        mouse→mice; tooth→teeth;

    单数句变复数句精炼

一 将下列单数句变为复数句

         1 This is a book .

         2 Is that a pen？

         3 She is a girl .

         4 I like her.

         5 The book is mine.

         6 This is her pen.

         7 I am a teacher.

         8 He is a boy student .

         9 She is a woman worker.

        10 He likes his bike.

二 将下列复数句变为单数句

         1 What are these？

         2 They like their bikes.

         3 These are my books .

         4 These are（some）books .

         5 Are those（any）pens？

         6 They are girls .

         7 We like them.

         8 These are（some）books .

         9 Are those（any）pens？

         10They like my bikes.

三 将下列名词变为复数形式

               单数句变复数句精炼答案

一 将下列单数句变为复数句

             1 These are（some）books .

             2 Are those（any）pens？

             3 They are girls .

             4 We like them.

             5 The books are ours.

             6 These are their pens.

             7 We are（some）  teachers.

             8 They are（some）boy students.

             9 They are（some）women workers.

            10 They like their bikes.

 二 将下列复数句变为单数句

            1 What is this？

             2 He likes his bike

             3 This is my book .

             4 This is a book .

             5 Is that a pen？

             6 She is a girl .

             7 I like her.

             8 This is a book ..

             9 Is that a pen？

            10 He likes my bike.

三 将下列名词变为复数形式

             maps      eggs      apples      oranges      pens 

             boxes       buses      girls       boys        babies 

             knives      photos    tomatoes      men       women

             milk      water     desks      tables       bikes