三年級英語單數句和複數句的知識點複習

口訣：

單數句子變，變化規則要記住。

名詞代詞要變化，am, is要變are。

this, that變成啥，these, those來替它。

he, she, it要變啥，全部變they不用怕。

I要變we莫落下，名詞後面把s/es加。

名前冠詞去掉它，其餘成分原樣加。

　具體注意下面的六要素：

1.單數主格人稱代詞要變成相應的複數主格人稱代詞，即I→we; you→you; she, he, it→they。 如： She is a girl.→They are girls.

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

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

4.普通單數名詞要變爲複數形式。如： It is a cat. →They are cats.

5.指示代詞this, that要變爲these, those。如： This is a book.→These are books.

6. man, woman作定語修飾可數名詞時，要在 "數"上與被修飾名詞保持一致。但其他名詞修飾名詞表示 "性質"時，不作變化。

如：

He is a man doctor.→They are men doctors. This is an apple tree.→They are apple trees. 單複數相互轉換，每空一詞(含縮寫)。

1. The woman is a nurse.(改爲複數句)

The _________ _________ _________.

2. There are some old cars.(改爲單數句)

There _________ _________ old _________.

3. He has a new book.(改爲複數句)

_________ _________ new _________.

4. Are these your chicks ?(改爲單數句)

_______ _______ your _______?

5. Is there a sheep in the playground?(改爲複數句)

________ there ________ ________ in the playground?