(1)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：Sheisagirl.→Theyaregirls.
(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 ar eboys.
(4)普通单数名词要变为复数形式。如：
It is an apple.→They are apples.
(5)指示代词this，that要变为these，those。如：
This is a box.→These ar eboxes.
