我拒绝了他的邀请用英文怎么说

可以说"I decpned his invitation."，表示"我拒绝了他的邀请"。

来源：decpne是一个动词，意思是"拒绝，拒绝，拒绝"。

例句：

I decpned his offer to join the company. (我拒绝了他公司的邀请)
She decpned his request to go on a date with him. (她拒绝了他的约会邀请)
He decpned my invitation to attend the party. (他拒绝了我的聚会邀请)