[okeuro49]

> Does the average English speaker really not know about the term "phrasal verb"? :-)

Yes.

Furthermore, I didn't know the English word for it, despite being a native speaker, but do know the German "Verben mit Präpositional-Ergänzung", from having learnt German.

Speakers of English as a foreign language will know more about English grammar than English native speakers.

[freedomben]

Speaking only for my own experience growing up in the Western United States in the 80s and '90s, everyone was taught grammar from elementary school through senior year in high school, where the only required course was English. All of the pieces were taught. However, there is widespread ignorance among native English speakers about grammar. I don't think it's lack of education, but something else. My theory is that it just isn't interesting or particularly useful or helpful, so the information is quickly forgotten. With most things in education, they recur on an ongoing basis through life. English grammar on the other hand, does not, because you can get remarkably far by just going on how things sound.

[joelegner]

I think the brain is designed to free up memory holding information that is not useful. Memory associated with a technical term like phrasal verb seems to be something it would garbage collect.

The brain will remember the term while it’s useful — to get a good grade on a test. After that, for most (almost all?) people it is useless to remember.