我要去上课了用英语怎么说

"I have to go to class" 是表示 "我要去上课了" 的常用英语表达方式。

其中 "have to" 是 "must" 的意思，表示 "不得不"，"必须"。"go" 是 "去" 的意思，"to class" 是 "上课" 的意思。

例句：

I have to go to class now. (我现在必须去上课了。)
I don't want to go to class today. (我今天不想去上课。)
Do you have to go to class this afternoon? (你今天下午必须去上课吗？)