900

source: 
Park
Entry: 
900
Example: 
I used to could
Modal 1: 
used to
Modal 2: 
could
Gender: 
Unknown
Race/Ethnicity: 
Unknown
Level of Education: 
Unknown
Home Community, Town, or State: 
TX (Unknown)
Year: 
1940
Sentence Structure: 
1.0
Notes: 
Cited from Park, Wilmer R. 1940. A letter from Texas, American Speech 15, p. 214. (See also COMMENTARY)