【正确答案】 1、informed his boss of his intention to resign    

【答案解析】[解析] ①要翻译的是谓宾部分，谓语动词用一般过去时。②“告诉某人某事”可以翻译成tell sb．sth．，也可以翻译成inform sb．of stlx。③“打算”可以翻译成名词intention也可以翻译成动词want，plan等。④“辞职”是resign，如果不知道运用该词，不妨说成quit his job。⑤还可以翻译成：told his boss that he would qult his job。