1.inform someone of something
They would inform him of any progress they had made.
他们将把自己所取得的任何进展都告诉他.
2.inform+从句
inform us how to find his house.
请告诉我们他家在哪里.
《21世纪大英汉词典》
所以去掉of 就对了
另外 如果不是过去时还有虚拟语气,could最好改成Can