Used to would.

source: 
LAGS
Entry: 
722
Example: 
Used to would.
Modal 1: 
used to
Modal 2: 
would
Gender: 
Male
Race/Ethnicity: 
Black
Age: 
90
Level of Education: 
Less than 1 term school; illiterate
Home Community, Town, or State: 
FL (Shady Grove)
Location Collected: 
FL (Shady Grove)
Year: 
1976
Relation to Addressee: 
subject to fieldworker
Medium: 
Spoken
Sentence Structure: 
unknown
Status: 
Naturalistic