| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used to work [prep] [art] | 63 |
|
| 2 | used to work [prep] [art] | 63 |
|
| 3 | used [to-vb] at [art] | 38 |
|
| 4 | used [verb] at [art] | 38 |
|
| 5 | [modal v] to work at [art] | 5 |
|
| 6 | used to work at [art] | 5 |
|
| 7 | used to work at [art] | 5 |
|
| 8 | used work at [art] | 5 |
|
