end
exe
同学们，认真观察下面的句子，你能找到this is和these are的用法有什么规律吗？ this is my hand. these are my hands.
this is my eye.these are my eyes.
this is my book. these are my books.
this is 后面用名词的单数。例如： this is my ear.
these are 后面用名词的复数。
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