他的故事纯属虚构。用英语怎么说？

他的故事纯属虚构。

His stories were purely invented.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

Stories

n. 故事( story的名词复数 )，（任何结构、构造的）层，<口>谎话，<美>楼层；

例句
Washington has been abuzz with stories about disarray inside the White House.
整个华盛顿都对白宫内发生的混乱议论纷纷。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

purely

adv. 完全地，十足地，纯粹地，纯洁地，贞淑地；

例句
Such is the size of the problem that these arguments are purely academic.
问题的实情在于这些论点纯属空谈。

invented

n. 虚拟；v. 发明，创造( invent的过去式和过去分词 )，编造；

例句
I launched into the parable, embellishing the story with invented dialogue and extra details...
我开始讲那则寓言，并编造了些对话，加了些细节对其进行润色。