The German correspondent of “Another invented rule” writes with another teacher-inspired query, going back to when he was a senior in high school. His story (lightly edited):
I had an English teacher back then, who abhorred (still abhors) AmE, and preferred BrE. He is neither American nor is he British. He’s German. According to him, Americans cannot speak English.
One day, we were asked to write a letter. We had to create a story of two people who are pen pals and who love sharing each other’s everyday stories.
I made up a story, wrote it down, and in one line I had written “.. I was laughing out loud….“
After a few days we got our homework back. What struck me the most was that he had marked “laughing out loud“ as a mistake. Above, he he had written “laughing out loudly“.
Now that I’ve checked on the Corpus of Contemporary American English, there is no entry with an “-ly“ ending. But when I type “laugh out loud“, I get many results.
My question for you is : Was my teacher correct? If not, why is it wrong to say “laughing out loudly”?
High marks to my correspondent for checking COCA, rather than relying on raw googling, since web searches will yield a respectable number of instances of laughing out loudly (and even a few of laughing aloudly), though these are wildly outnumbered by the standard English (Br or Am) laughing out loud.