数词+of等于量词的用法吗？

There were about eighty of them. Their ages were from about nine to twenty.

老师，数词+of等于量词的用法吗；from about...等介词接介词短语的词有那些，多不多？

网友ruiqiang 怎么经常提问这样的一些问题呢？

about 是副词，表示“概数”，用在数词之前，意为“大约”。

现在，去掉之后，是多么简单的句子，不要让一个词遮住了你的眼睛。

There were eighty of them.

Their ages were from nine to twenty.

不要再问这些毫无意义的问题了，这样下去，对英语学习有害。

刘永科 - 教育出版集团英语总顾问 & 英语系列图书主编

擅长：语法理论,语言学,文化背景 | 采纳率 86% | 回答于 1秒前

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陈才 - 英语教师 1秒前

擅长：中考英语,词法问题

There were about eighty of them. Their ages were from about nine to twenty.

about 为副词，表示大约，大概意思，

Their ages were from nine to twenty.

他们的年龄是从8岁到20岁。