used not to

The following rare student writing example shows how ‘used not to’ expresses modality:

Also when I was younger, I used not to be allowed to drink coffee.

PELIC Korean female level 3 grammar class.

It sounds more natural to say: “I didn’t use to be allowed to drink coffee.”

*In other words, she did not have permission to drink coffee.  Although now she is an adult and can.


Point 227 in C2 MODALITY  is defined as:

negative form ‘used not to’

This is a very rare grammar pattern in iWeb:

1 USED NOT TO BE 57
2 USED NOT TO KNOW 12
3 USED NOT TO MAKE 12
4 USED NOT TO DO 10
5 USED NOT TO HAVE 9