"我以后要去北京" 可以用中文说成 "I will go to Beijing in the future."
"英语" 是英文 "Engpsh" 的翻译。
下面是一些用英语表达 "我以后要去北京" 的例句：
I'm planning to visit Beijing in the future.
I hope to travel to Beijing someday.
I'm looking forward to going to Beijing.
I have always wanted to go to Beijing.
在这些例句中，"in the future" 意思是 "以后"，"someday" 意思是 "某一天"，"looking forward to" 意思是 "期待"。
"I will go to Beijing in the future" 的中文翻译是 "我以后要去北京"。