"What did you did?"

[Stefanie]

I'm just reading a book by John Irving, "A widow for one year" - and I came across the above phrase at least twice.
Here's one example for how he used it

[Mister Micawber]

.
Yes, it is the representation of a typical 4-year-old learning her grammar.
.
_________________
Canadian-American native speaker
who teaches English for a living at Mister Micawber's
ESL cafe: Interview with Mr. Micawber

[Stefanie]

OK, thank you!