句子单数 变 句子复数。
可以从以下几个方面进行改变:
1.主格人称代词变成复数人称代词。
I变we
he、she、it 变成they
She is a girl.-They are girls.

2.is、am -变成are
I am a student . ― We are students .

3.a /an 去掉
He is a boy.― They are boys.

4.名词单数变复数。
It is an apple.― They are apples .

5.this 变these, that 变those
This is a car. -These are cars.

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