我祖父教了一辈子书，教书是他所干过的唯一的工作的翻译：My grandfather taught all his life, teaching is his only work done by 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

My grandfather taught life books, his teaching is the only work done

My grandfather taught all his life, teaching is his only work done by

My grandfather has taught the book, teaching is for a lifetime he has done the only work

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My grandfather taught all his life, teaching is his only work done by