上了初中后用英语怎么说

在上了初中后，可以使用一些表达来表示这个意思。
一种表达方式是："After entering junior high school"。
这个表达的来源是由两个短语组合而成的：
"After" 是一个副词，表示 "在…之后"。
"Entering" 是一个动词，表示 "进入"。
"Junior high school" 是一个名词短语，表示 "初中"。
因此，"After entering junior high school" 就可以表示 "在上了初中后" 的意思。
下面是一些例句：
I started learning French after entering junior high school. (我在上了初中后开始学习法语。)
She became interested in art after entering junior high school. (她在上了初中后对艺术产生了兴趣。)
He joined the basketball team after entering junior high school. (他在上了初中后加入了篮球队。)
此外，也可以使用其他表达来表示这个意思，例如：
After starting junior high school (在开始初中后)
After going to junior high school (在去到初中后)
After completing junior high school (在完成初中后)
例句：
He became more outgoing after starting junior high school. (他在开始初中后变得更外向。)
She started playing the piano after going to junior high school. (她在去到初中后开始弹钢琴。)
He decided to become a doctor after completing junior high school. (他在完成初中后决定成为医生。)