格林先生从20岁开始就一直在这里教书的翻译：Mr Green from the age of 20 have been taught here 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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Mr Green from the age of 20 have been taught here

Mr. Grimm starts from 20 years old continuously to teach in here

Mr. Green started from 20 years old has been on teaching here

Mr Green from the age of 20 have been taught here