-Is this your eraser? -No,it's theirs erase.应改为:
1.-Is this your eraser? -No,it's their erase.或
2.-Is this your eraser? -No,it's theirs .
理由
形容词性物主代词their 起形容词的作用,用在名词前erase。类似用法如
1. This is my book. 这是我的书。
2. We love our motherand. 我们热爱我们的祖国。
名词性物主代词 theirs起名词的作用,所以后面省掉eraser。又如
1. Look at the two pencils. The red one is yours and the blue one is mine.
看那两支铅笔,红色的是你的,蓝色的是我的。
2. He likes me. He doesn’t like her.
他喜欢我。不喜欢她。
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