句子單數 變 句子復數。
可以從以下幾個方面進行改變：
1.主格人稱代詞變成復數人稱代詞。
I變we
he、she、it 變成they
She is a girl.-They are girls.
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2.is、am -變成are
I am a student . ― We are students .
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3.a /an 去掉
He is a boy.― They are boys.
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4.名詞單數變復數。
It is an apple.― They are apples .
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5.this 變these， that 變those
This is a car. -These are cars.
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