with butterflies in my stomach用法疑问

习语：have/get/feel butterflies (in your stomach)

你说得对，have/get/feel butterflies (in your stomach) 是习语，意思是“（做某事前）情绪紧张，心里发慌”。如：

I have butterflies in my stomach. 我心里七上八下的。

Some actors never have butterflies before going on stage. 有些演员上台前从不紧张。

He had butterflies in his stomach as he went to the boss’s office to ask for a rise. 他到经理办公室去要求增加工资的时候，他的心扑通直跳。

An exam, or even an exciting social event may produce butterflies in the stomach. 一场考试，甚至是一次令人兴奋的社会活动，都有可能让人心里发慌。

变体：with butterflies in my stomach

With butterflies in my stomach 也表示“十分紧张”，但在词典中没有查到，是因为它是 have/get/feel butterflies (in your stomach) 的变体，由于 with butterflies in my stomach 中没有动词（所以不用作谓语），而 with butterflies in my stomach 只是一个介词短语（或 with 复合结构），所以不用作谓语，而主要用作状语。事实上 with butterflies in my stomach 这一变体在英语比较常见，在高考英语试题也曾出现过。如：

On the first day of my first grade, I stood by the door with butterflies in my stomach. I ___1___ (voice) my biggest concern to my mother, “How will I make friends?”She handed me advice, “Be yourself.” For the past 20 years, I have lived by these words. Soon I will graduate and become part of the real world. Nervously ___2___ (face) challenges, I know I will whisper to ___3___ (I) the two simple words “Be yourself”.……（2019年高考英语北京卷“语法填空”）