| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there used to be | 341 |
|
| 2 | there used to [be] | 341 |
|
| 3 | there used to be | 341 |
|
| 4 | there used to [be] | 341 |
|
| 5 | there used to [be] | 341 |
|
