| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] used to [verb] | 50 |
|
| 2 | we [modal v] to [verb] | 18 |
|
| 3 | we used [prep] [verb] | 13 |
|
| 4 | we used to [verb] | 13 |
|
| 5 | we used [prep] [verb] | 13 |
|
