他到国外去了英语怎么说

"他到国外去了"可以用英文表达为"He went abroad"。
"Abroad"是一个副词，意思是"在国外"或"到国外"。这个词源自中世纪拉丁语"abroad"，意思是"到外面"或"远离家乡"。
下面是一些例句，希望能帮到你：
He went abroad for his studies. 他去国外深造。
She's been living abroad for the past few years. 她在国外生活了几年。
They're planning to travel abroad next summer. 他们计划明年夏天出国旅游。
He's always dreamed of living abroad. 他一直梦想着住在国外。