他一吃完就告辞离开了。用英语怎么说？

他一吃完就告辞离开了。

As soon as he'd finished eating, he excused himself...

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

soon

adv. 立刻，马上，一会儿，不久，快，宁愿；

例句
The minister advised him to leave as soon as possible...
部长建议他尽快离开。

finished

adj. 完成了的，技术高超的，精湛的，〈俚〉死了的，完蛋了的；v. 结束，完成( finish的过去式和过去分词)；

例句
Despite the adverse conditions, the road was finished in just eight months.
尽管存在种种不利情况，公路还是仅用8个月就完工了。

eating

n. &adj. 吃，食物，食用的，可生食的；v. 吃，喝，吃饭（ eat的现在分词 ），（食物）吃起来感到，咬，（人）感到苦恼（或烦恼）；

例句
He started eating an apple...
他开始吃苹果。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

excused

v. 原谅( excuse的过去式和过去分词 )，使免除，准许…离开，为…辩解；

例句
He excused himself by saying he was 'forced to rob to maintain my wife and cat'...
他辩解说自己是“为了供养妻子和猫儿被迫去抢劫的”。

himself

pron. （反身代词）他自己，（用以加强语气）他亲自，他本人；

例句
He pleaded guilty before a court martial to absenting himself without leave.
在军事法庭上他对自己擅离职守表示服罪。