小學(xué)升學(xué)�？加⒄Z(yǔ)知識(shí)點(diǎn)：句子單數(shù)變復(fù)數(shù)

　　句子單數(shù)變復(fù)數(shù)，注意以下五要素

　　(1)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 an apple. →They are apples.

　　(5)指示代詞this，that要變?yōu)閠hese，those。如：

　　This is a box. →These are boxes.