1.一本有用的书用英语说:a useful book。
2.例:这是一本有用的书,况且又不贵。Its a useful book, and whats more, not an expansive one.
3.例:这是一本有用的书,而且很有趣。This is useful book and what is more, it is interesting.
4.例:那不是一本有用的书,是吗?That isnt a useful book, is it?