我升入初中已经两年了用英语怎么说

你可以说"I have been in junior high school for two years."

其中的 "I have been in junior high school" 是表达现在状况的短语，表示"我已经在初中了"。"for two years" 表示"两年了"。

例句:

"I've been studying English for two years." (我学习英语已经两年了。)
"She has been working at that company for three years." (她在那家公司工作已经三年了。)

来源: 这是一个常见的表达方式，常在日常口语或书面语中使用。