三年級英語單數(shù)句和復(fù)數(shù)句的知識點復(fù)習(xí)
三年級英語單數(shù)句和復(fù)數(shù)句的知識點復(fù)習(xí)
口訣:
單數(shù)句子變,變化規(guī)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,名詞后面把s/es加。
名前冠詞去掉它,其余成分原樣加。
具體注意下面的六要素:
1.單數(shù)主格人稱代詞要變成相應(yīng)的復(fù)數(shù)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?yōu)閍re。 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(shù)名詞要變?yōu)閺?fù)數(shù)形式。如: It is a cat. →They are cats.
5.指示代詞this, that要變?yōu)閠hese, those。如: This is a book.→These are books.
6. man, woman作定語修飾可數(shù)名詞時,要在 "數(shù)"上與被修飾名詞保持一致。但其他名詞修飾名詞表示 "性質(zhì)"時,不作變化。
如:
He is a man doctor.→They are men doctors. This is an apple tree.→They are apple trees. 單復(fù)數(shù)相互轉(zhuǎn)換,每空一詞(含縮寫)。
1. The woman is a nurse.(改為復(fù)數(shù)句)
The _________ _________ _________.
2. There are some old cars.(改為單數(shù)句)
There _________ _________ old _________.
3. He has a new book.(改為復(fù)數(shù)句)
_________ _________ new _________.
4. Are these your chicks ?(改為單數(shù)句)
_______ _______ your _______?
5. Is there a sheep in the playground?(改為復(fù)數(shù)句)
________ there ________ ________ in the playground?