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三年级英语单数句和复数句的知识点复习

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  口诀:

  单数句子变,变化规则要记住。

  名词代词要变化,am, is要变are。

  this, that变成啥,these, those来替它。

  he, she, it要变啥,全部变they不用怕。

  I要变we莫落下,名词后面把s/es加。

  名前冠词去掉它,其余成分原样加。

  具体注意下面的六要素:

  1.单数主格人称代词要变成相应的复数主格人称代词,即I→we; you→you; she, he, it→they。 如: She is a girl.→They are girls.

  2. am, is要变为are。 如: I'm a student. →We are students.

  3.不定冠词a, an要去掉。如: He is a boy. →They are boys.

  4.普通单数名词要变为复数形式。如: It is a cat. →They are cats.

  5.指示代词this, that要变为these, those。如: This is a book.→These are books.

  6. man, woman作定语修饰可数名词时,要在 "数"上与被修饰名词保持一致。但其他名词修饰名词表示 "性质"时,不作变化。

  如:

  He is a man doctor.→They are men doctors. This is an apple tree.→They are apple trees. 单复数相互转换,每空一词(含缩写)。

  1. The woman is a nurse.(改为复数句)

  The _________ _________ _________.

  2. There are some old cars.(改为单数句)

  There _________ _________ old _________.

  3. He has a new book.(改为复数句)

  _________ _________ new _________.

  4. Are these your chicks ?(改为单数句)

  _______ _______ your _______?

  5. Is there a sheep in the playground?(改为复数句)

  ________ there ________ ________ in the playground?


 
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