I used to could.
source:
LAGS
Entry:
646
Example:
I used to could.
Modal 1:
used to
Modal 2:
could
Gender:
Female
Race/Ethnicity:
White
Age:
93
Level of Education:
High school equivalent
Home Community, Town, or State:
AR (Searcy)
Location Collected:
AR (Searcy)
Year:
1974
Relation to Addressee:
subject to fieldworker
Medium:
Spoken
Sentence Structure:
1.0
Status:
Naturalistic