在初中学习英语时的心情可以用英语表达为 "mood while learning Engpsh in junior high school"。这个表达的来源是指在初中学习英语这一特定时间段内的心情。

下面是一些使用这个表达的英文例句，并附上中文翻译：

"I was really nervous about my Engpsh exams in junior high school. That was my mood while learning Engpsh."
(我在初中的英语考试真的很紧张。那就是我在初中学习英语时的心情。)

"My mood while learning Engpsh in junior high school was mostly positive. I enjoyed learning new words and grammar rules."
(我在初中学习英语时的心情大多是积极的。我喜欢学习新单词和语法规则。)

"I struggled a lot with Engpsh in junior high school and my mood was often frustrated. But I eventually started to make progress and that improved my mood."
(我在初中学习英语时遇到很多困难，因此常常感到沮丧。但是后来我开始取得进步，这使我的心情好转了。)